RMRDY70A–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 956. Potamogetonpralongus. 957^ potamogeton perfoliatus.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRDY6YB–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 960. Potamogeton obtusifolius.. S'fil. Potamogeton acutifolius.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRG2XMJ–. The Canadian field-naturalist. Natural history. 17. Potamogeton pusillus var. pusillus. T———— -A A € ^>V^ ^gT^i^ " '^ %^ / Cc^ 78. Potamogeton subsibiricus f^^>>A 3/^*^ Jt^ 'qI •3c^ ^^^ ^.^ .-*^ ^ %<. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
RMRHPBK5–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. i. Leaf of Potamogeton showing scattered colonies of Folliculina. X3 diam. Photograph of preserved specimen. but there were very few large aggregates covering half the surface of a single leaf. Most leaves had none, some leaves had many scattered individuals. On the stems there were noticeable numbers of the small form of sac. The occurrence on leaves seemed entirely arbitrary as if from settlements of swimmers: the Folliculina was not now crowded toward the tips of the sprays but scattered along many inches of the spra
RMRDYHY9–. An introduction to vegetable physiology. Plant physiology. 108 VEGETABLE PHYSIOLOGY the mode of formation is different. A mass of tissue lying in the position of the subsequent cavity does not keep pace in its development with the growth of the cells sur- rounding it, and consequently becomes ruptured, and the cells of which it is composed are gradually destroyed, leav- ing a cavity of some size. Instances of this mode of formation are afforded by the stems of Equisetum (fig. 77),. Fig. 76.—Section op Stem op Potamogeton, showing Air Passages in the Cortex. the haulms of grasses, and the hol
RMRDY71C–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 9541' Potanidgeton heterophyllus. 955. Potamogeton lucens.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRDY71M–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 952. Euppia maritima.. 953. Potamogeton natans.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRDY6YK–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 958. Potamogeton crispiis. 959. PotamogetoD densus.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRDY6YG–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 234. 960. Potamogeton obtusifolius.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRE2968–. An introduction to vegetable physiology. Plant physiology. 36 VEGETABLE PHYSIOLOGY water in which it hves, the gas being dissolved therein. Aquatic plants also obtain their oxygen from this source, but many of them are composed of a large number of cells, most of which are situated at some distance from the exterior. In such plants large cavities or reservoirs are constructed, in which a quantity of air is slowly accumulated. Iha. 34.—Section of Stem or Potamogeton, showing Aik I'assages IN THE COETEX, and into which the respiratory products can be discharged. From such reservoirs the oxygen
RMRDY71G–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 953. Potamogeton natans.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, Worthington George, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve & Co.
RMRG2XM4–. The Canadian field-naturalist. Natural history. T———— -A A € ^>V^ ^gT^i^ " '^ %^ / Cc^ 78. Potamogeton subsibiricus f^^>>A 3/^*^ Jt^ 'qI •3c^ ^^^ ^.^ .-*^ ^ %<. 79. Potamogeton zosteriformis. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
RMRE0NJ4–. Elementary botany. Botany. ZONAL DISTRIBUTIOiY OF PLANTS. 407 overhanging willows. On the left, pond-weeds (Potamogeton natans) and the yellow water lily, or spatter-dock (nuphar),. Fig. 500. Yellow water lily on jutting ann in stream. {Photograph by the author.) float their leaves and flowers on the quiet water, while the small yellow flowers of the mud plantain (Heteranthera graminifolia) glitter in the sunlight. The arrow-leaf (Sagittaria heterophylla,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration a
RMRDWDG2–. Elementary botany. Botany. ZONAL DISTRIBUTION OF PLANTS. 407 overhanging willows. On the left, pond-weeds (Potamogeton natans) and the yellow water lily, or spatter-dock (nuphar),. Fig. 500. Yellow water lily ou jutting arm in stream. (Photograph by the author.) float their leaves and flowers on the quiet water, while the small yellow flowers of the mud plantain (Heteranthera graminifolia) glitter in the sunlight. The arrow-leaf (Sagittaria heterophylla,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration an
RMRDWR03–. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 174 AfiRENCHYMA Other examples of adaptation to the habitat-conditions in aquatics are :—restriction of the stomata to the upper surface of floating leaves, development of a covering of wax on the. Fig. 91.—Transverse section of the vascular strand of the Floating Pond- weed [Potamogeton natans). C, xylem-canals ; E., endodermis ; I., air-canal; P., sieve-tube. latter, and the aerenchyma encountered in certain marsh-plants (e.g. Purple Loosestrife, Lyiliritm salicaria ; Gipsj'wort, Lycopus ciirofcetts; Hairy
RMRHBT68–. The book of water gardening;. Aquatic plants. [from old catalog]. THE BOOK OF WATER GARDENING. EIGHT DESIRABLE WATER PLANTS I. Anacharis Canadensis. 2. Potamogeton natans. narrow^ leaved. 3. Potamogeton crispus. 4. Sagittaria Sinensis (Giant Sagittaria). 5. Sagittaria natans. 6. Myriophyllum proserpinacoides. 7. Ludvigia Mulertii. 8. Cabomba Caroliniana [III]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Bisset, Peter
RMRDWM22–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 962. Potamogeton perfoliatus, L. Perfoliate Pondwced.. 963. Potamogeton crispus, L. Curly Pojtdiveed.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve
RMRHBTMB–. The book of water gardening; giving in full detail all the practical information necessary to the selection, grouping and successful cultivation of aquatic and other plants required in the making of a water garden and its surroundings, and covering all conditions from that of the amateur with a few plants in tubs to the large estate or park. Water gardens. THE BOOK OF WA7ER GARDENING. EIGHT DESIRABLE WATER PLANTS 1. Anacbaris Canadensis. 2. Potamogeton natans. narrow leaved. 3. Potamogeton crispus. 4. Sagittaria Sinensis (Giant Sagittaria). 5. Sagittaria natans. 6. Myriophyllum proserpinacoi
RMRHWJCC–. Bergens Museums aarbok. Science; Natural history. Fig. 4. Assoziationen von Potamogeton natans, Scirpus palustris und Glyceria fluitans im Maakeskitmyr. R. N. phot. Juli 1916.. Fig. 5. Hippuris, Sparganiam affine, Potamogeton natans und Hydrocotyle im Maakeskitmyr. R. N. phot. Juli 1916.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Bergens Museum. Bergen : Det Museum
RMREA2XD–. Early British botanists and their gardens. Botany; Botanists; Botany; Plants, Cultivated. POTAMOGETON CRISPUS. torne, of a reddish greene colour: the foot-stalkes are something long and thicke, and rise up from amongst those leaves, which alwaies grow two one opposite against another, in a contrarie manner to those that grow below on the stalk: neare the top of which foot-stalke groweth small grape-like huskes, out of which spring. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these il
RMRDWM1Y–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. II. Monocotyledons'] LXXVIII. NAIADES,. 241. 964. Potamogeton densus, L. Opposite Pondweed.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. London, L. Reeve
RMRE9N19–. Contributions from the Osborn Botanical Laboratory. Plants. Nichols: The vegetation of Connecticut 255 plain succession. The pond-lilies also are usually absent. Com- monly the first forms to appear arc submersed species, such as the pondweeds {Potamogeton sp.), VaUisveria spiralis and Elodea canadensis, which may grow in water four or even more feet in depth. In shallow water various aquatics with aerial foliage are ordinarily conspicuous. Of these, the following species are perhaps the most noteworthy:*. Fig. 6. Flood plain island in the Connecticut River, at Haddam. The plant in the foreg
RMRDYHRB–. Morphology of angiosperms (Morphology of spermatophytes. Part II). Angiosperms; Plant morphology. 192 MORPHOLOGY OP ANGIOSPERMS it we would cite Sparganium (Campbell55), Potamogeton (Wiegand,63 Ilolferty71), Zannichellla and Naias (Camp- bell 41), Triglochin (Hill60), and Limnocharis (Hall 82). The last-mentioned form well illustrates that the general type may be maintained, and at the same time there may be no regularity in the sequence of divisions after the first two. In fact, the apical cell of the proernbryo of Limnocharis may divide by a transverse, oblique, or longitudinal wall, and i
RMRDB725–. Fresh-water biology. Freshwater biology. Fig. 255. Potamogelon natans. One floating leaf and three submerged leaves, representing the thread-like form of the monocotyledonous type of sub- merged leaf. (After Gobel.) thread-like leaves are very common and may be the only kind occur- ring on the plant, as in Potamogeton pectinatus, or they may occur on the same plant together with floating leaves, as in Potamogeton natans (Fig. 255). It is to be noticed that most of the monocoty- ledons conform to some one of the types mentioned, while the dicotyledons seem to favor another habit, such as is s
RMRG313X–. The Canadian entomologist. Insects; Entomology. 266 THE CANADIAN ENTOMOLOGIST. The eggs of ahominator are laid on the upper surface of Lemna fronds in rather large masses. In only one instance were the eggs found on any other plant, and in this case they were on the edge of a Potamogeton leaf which was floating oti the water. They are quite firmly attached to the frond and to each other. The base of. Fig. 10.—Egg masies Culex ahominalov. the egg is truncate, facilitating a firm attachment. The eggs are very black and the masses show up distinctly in contrast with the green of the frond. They
RMRDYH96–. An introduction to vegetable physiology. Plant physiology. 330 VEGETABLE PHYSIOLOGY Some have, however, very short stems which give rise to numerous elongated ribbon-like leaves. These flexible stems depend for their support upon the nature of the medium in which they live, and though they possess a cer- tain rigidity, this is not associated with any great develop- ment of iwoody tissue. Generally the latter is reduced to a minimum ; the fibro-vascular bundles are usually few and. Fig. 139.—Section op Stem of Potamogeton, showing Aib Passages in the Cortex. contain few lignified elements. Th
RMREK8JW–. Classification of wetlands and deepwater habitats of the United States. Wetlands -- United States; Wetland ecology -- United States; Aquatic ecology -- United States. 54. Plate 7.—Classification: system Estuarine, SUBSYSTEM Subtidal, class Aquatic Bed, SUBCLASS Submergent Vascular, water regime Subtidal, water chemistry Oligohaline, SOIL Mineral. The dominant plant is water milfoil {Myriophyllum exal- bescens) and the most common subordinates are pondweeds {Potamogeton spp.). (Nansemond County, Virginia; July 1973). Please note that these images are extracted from scanned page images that ma
RMRD3RXH–. Elementary botany. Botany. ZONAL DISTRIBUTION OF PLANTS. 407 overhanging willows. On the left, pond-weeds (Potamogeton natans) and the yellow wrater lily, or spatter-dock (nuphar),. Fig. 500. Yellow water lily on jutting arm in stream. (Photograph by the author.) float their leaves and flowers on the quiet water, while the small yellow flowers of the mud plantain (Heteranthera graminifolia) glitter in the sunlight. The arrow-leaf (Sagittaria heterophylla,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration a
RMRG3RBD–. The Canadian field-naturalist. Figure 1. Distribution of Isoetes engelmannii in North America after Taylor et al. (1985) with the disjunct Georgian Bay locations and Michigan locality included. Ecology At both sites /. engelmannii was rooted in a fine sandy or silty substrate. Also at both sites, Isoetes echinospora, Isoetes X eatonii, Eleocharis acicula- ris, Najas flexilis, Sagittaria graminea, Vallisneria americana and small plants of Potamogeton richardsonii were growing nearby. At Big Chute additional associated species in approximate order of importance included Potamogeton gramineus,
RMRHDB3P–. The book of the aquarium and water cabinet; or Practical instructions on the formation, stocking, and management, in all seasons, of collections of fresh water and marine life. Aquariums; Aquarium plants. 28 THE FEESH-WATEE AQUARIUM. the top of an arch, but not for the deep water of the tank. The plant is perennial and produces a white blossom, with one petal and four stamens. The flower-stem is velvety, and the leaves spread in a tuft from the root.. POTAMOGETON DENSUS. Utricularia Vulgaris, or the hooded milfoil, may be re- commended as a botanical curiosity, but is met with only (as far I
RMRDB728–. Fresh-water biology. Freshwater biology. l82 FRESH-WATER BIOLOGY. Fig. 255. Potamogelon natans. One floating leaf and three submerged leaves, representing the thread-like form of the monocotyledonous type of sub- merged leaf. (After Gobel.) thread-like leaves are very common and may be the only kind occur- ring on the plant, as in Potamogeton pectinatus, or they may occur on the same plant together with floating leaves, as in Potamogeton natans (Fig. 255). It is to be noticed that most of the monocoty- ledons conform to some one of the types mentioned, while the dicotyledons seem to favor an
RMRE1MRD–. Flowers of the field. Botany. 270 PETALOTDE.^, small, and only two arc natives ot Britain. A species of com- paratively recent introduction is Anacharis Alsinastrum, a sub- merged aquatic, having much the habit of Potamogeton densiis, from which it may be at once distinguished by bearing its leaves three and sometimes four in a whorl. It increases so rapidly that in some places it has seriously impeded canal navigation, and it is a troublesome pond weed. It is a native of North America, but how it was introduced into this country is unknown.. Please note that these images are extracted from
RMRGW1N5–. Bulletin. Natural history; Natural history. Aug.1981 Moran: Aquatic Macrophytes 399 Another group of plants are the floating-leaf plants (ephydates) that grow rooted in the sediments but have at least some leaves floating on the water surface with one leaf surface exposed to the atmosphere. These plants are somewhat sensitive to current and wave action and are usually found in protected areas. Only two plants of this group have been described in Lake Sangchris, Bacopa rotundifolia (Michx.) Wettst. (water hyssop) and Potamogeton nodosus. In the ephydates it has been noted that those plants wi
RMRH30H9–. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST.. 9. 1996 group do not, therefore, overwinter but may sometimes be found around midsummer, awaiting emergence fully developed within their cocoons. In contrast to foodplants of the first group (Care.x, Phragmites, Typha and Sparganium erectum), the foliage of plants upon which adult .beetles of the second group feed (Sagittaria, Potamogeton spp. and Sparganium emersum) does not reach full development until after midsummer. Collecting techniques The simplest and most informative method of det
RMRDB71R–. Fresh-water biology. Freshwater biology. THE LARGER AQUATIC VEGETATION 183 nature seem to be able to bring forth either floating or submerged leaves or both as the conditions imposed seem to require. If grow- ing shoots of Ranunculus aquatilis are not allowed to reach the surface of the water only the segmented leaves develop. If speci- mens of Potamogeton heterophylhis are suddenly left stranded by receding water thp floating leaves may persist and be succeeded by more floating leaves, thus enabling the plant to live for a considerable time, often persisting until the rising water returns.
RMRH29YF–. British plants : their biology and ecology. Plants; Plant ecology. Fig. 18 -Formation of Brood-Bud in Potamogeton crispus. Half Natural Size. After Kerner.) (About To the left a bud still attached to plant, to the right the separate bud. usually elastic and very flexible, so that they can, by coiling or uncoiling, adjust themselves to variations in the depth of the water. 2. The Long Floating Ribbon-Type.—This differs in no respect from that previously described, except that it is not submerged. It is found in Sparganium natans. and in the floating manna-grass (Glyceria fiuitans). Heterophyl
RMRDX0EB–. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by J.D. Hooker. Botany. XXI. APONOGETE^. 805. Potamogeton crUpus. Toung
RMRG5GE6–. Assessment of aquatic habitats on the Matador Ranch Phillips Co., MT. Aquatic invertebrates; Stream ecology; Watershed ecology. Matador Perennial Pond Scirpus (Big Stem Bulrush) emergent vegetation dominated, with Spikerush (Elocharis sp.) present and abundant. Fully aquatic plants included Meriophyllum sp. and Potamogeton sp. Macroinvertebrate Community: This community of prairie stream invertebrates consists of the Prairie Pool assemblage (SPA #12, Stagliano 2005). The 2007 sample was dominated by the snails (Physella- 100's), (Gyraulus, Helisoma anceps and Stagnicola -a few), the damselfl
RMRHK485–. Biology and man. Biology; Human beings. Ranunculus Potamogeton Sagittaxia LEAVES IN AIR AND IN WATER The deeper the leaves of the water crowfoot are submerged, the more divided up they are. For a given amount of tissue, finely divided leaves have a greater absorb- ing surface. Pondweeds and arrowheads bear broad leaves in the air and long ribbon-shaped leaves in the water water filling the soil spaces keeps the roots submerged too long. The roots of rice are fine and threadlike, exposing much surface through which an adequate supply of oxygen is obtained from the surrounding water. If the wa
RMRGBT2B–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Fig. 13.—Potamogeton prwlongus. Fig. 14.—Potamogeton perfoliatus.. Fig. 15.—Potamogeton foliosus. B400M Fig. 16.—Potamogeton pusillus. 840IM Figs. 13-16.—Wide ranging species of pondweeds. (From Morong.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
RMRDWM24–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 960. Potamogeton lucens, L. 961. Polamogetonprcelongus, Wulf. Shining Pmdweed. Zo„g Pondmeed.. 962. Potamogeton perfoliatus, L. Perfoliate Pondwced.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Hand
RMRFWPAF–. The Canadian naturalist and geologist. Natural history -- Periodicals. 1866.] DAWSON—ON POST-PLIOCENE PLANTS. < 3 8. Potamogeton pusillus. Quantities of fragments which I refer to this species occur in nodules at Green's Creek. They may possibly belong to a variety of P. hybridus which, together with P. nutans, now grows in the river Ottawa, where it flows over the beds containing these fossils. 9. Caricece and Graminece. Fragments in nodules from Green's Creek, appear to belong to plants of these groups, but I cannot venture to determine their species. 10. Equisetum sdrpoides Michx. Frag
RMRGBT3T–. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. Fig. 9.—Potamogeton natans. B394M Fig. 10.—Potamogeton lucens.. Fig. 11.—Potamogeton heterophyllus. Fig. 12.—Potamogeton lonchites. B397M Figs. 9—12.—Wide-ranging species of pondweeds. (From Morong.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
RMREA2XB–. Early British botanists and their gardens. Botany; Botanists; Botany; Plants, Cultivated. DESCRIPTIONS OF PLANTS very small reddish flowers, like those of the Oke, every flower having foure very small round topped leaves. After every flower commeth commonly foure sharpc pointed graines growing together, containing within them a little white kernell. The lower part of the stalke hath at every ioint small white threddie roots, somewhat. POTAMOGETON DENSUS. long, whereby it taketh hold in the mudde, and draweth nourish- ment unto it. The whole plant is comonlie covered over with water. It flowe
RMRG2XMY–. The Canadian field-naturalist. Natural history. 2002 Cook and Roland: Notable Vascular Plants from Alaska 209 ^^-^^-w /^ c C â :?^ ⢠fe J '^A^ ]r^ ^L^ ^ > "OV. ^Ji ^P-v-^ "^ < ^â ^ .-J^ ^. 17. Potamogeton pusillus var. pusillus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
RMRG3RBN–. The Canadian field-naturalist. 68 The Canadian Field-Naturalist Vol. 105. Figure 1. Distribution of Isoetes engelmannii in North America after Taylor et al. (1985) with the disjunct Georgian Bay locations and Michigan locality included. Ecology At both sites /. engelmannii was rooted in a fine sandy or silty substrate. Also at both sites, Isoetes echinospora, Isoetes X eatonii, Eleocharis acicula- ris, Najas flexilis, Sagittaria graminea, Vallisneria americana and small plants of Potamogeton richardsonii were growing nearby. At Big Chute additional associated species in approximate order of
RMRG2PD5–. The Canadian field-naturalist. 72 The Canadian Field-Naturalist Vol. 94 1959). The only collection from the area west of the Continental Divide is that from Utah (Fernald 1932; Haynes 1974; Cronquist et al. 1977). In British Columbia we found it in the lower Eraser Valley (Kawkawa Lake near Hope) and in the Rocky Mountain Trench (Windermere and Columbia lakes). It occurs with Heteranthera dubia in Kawkawa Lake, and with Megalodonta beckii in both Windermere and Columbia lakes. Potamogeton strictifolius is related to P. friesii but is distinguished by its acute leaf tips and revolute leaf mar
RMRDKCBW–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. angled face; embryo with the apex pointing slightly inside of the base. In Mystic Pond, Medford, Mass. Also in Europe. Summer. Apparently a mere form of the preceding, or perhaps a hybrid between P. angustifolius and P. heterophyllus. ii. Potamogeton illinoensis Morong. Illinois Pondweed. Fig. 184. Potamogeton illinoensis Morong, Coult. Bot. Gaz. 5: 50. 1880. S
RMRHA029–. Botanisk tidsskrift. Botany; Plants; Plants. — 257 — The epidermis-cells which, like the barkcells, contain chloro- plasts (fig. 1, A, B, D), are in the different species rather different in size: being proportionally small in the species that have one stratum of cells (or more) between epidermis and the outmost. Fig. 2. Portions of the transverse sections of the stem of several Potamogeton- species. A, P. j>erfoliatus ; one of the vascular bundles of the axial cylinder. — B, P. coloratus ; one of the vascular bundles of the axial cylinder. — G, P. lucens; endodermis. — D, P. zosterifoliu
RMRE0EK6–. Ecology and behavior of the Manatee (Trichechus manatus) in Florida. Manatees; Mammals. Hartman—Manatee in Florida 9. Fig. 4. Distribution of important submerged aquatic plants in Kings Bay and the upper reaches of the Crystal River: A, elodea {Hydrilla verticillata) and wid- geongrass (Ruppia maritima); B, Eurasian water milfoil {Myriophyllum spicatum); C, coontail (Ceratophyllum demersum) and sago pondweed {Potamogeton pectinatus); D, wildcelery {Vallisneria neotropicallis). six most important species are given in Table 1. The results indi- cated that Hydrilla had by far the greatest bioma
RMRDKCA3–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Potamogeton compressus L. Sp. PI. 127. 1753. Potamogeton sosteraefolius Schum. Enum. PI. Saell. 50. 1801. Stems much flattened, sometimes winged, widely branching. Leaves linear, obtuse and mucronate or short-pointed at the apex, 2'-i2' long, i"-a" wide, with 3 principal nerves and many fine ones; stipules scarious, obtuse, finely nerved, soon perishi
RMRDKCC3–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. PONDWEED FAMILY. 79. angled face; embryo with the apex pointing slightly inside of the base. In Mystic Pond, Medford, Mass. Also in Europe. Summer. Apparently a mere form of the preceding, or perhaps a hybrid between P. angustifolius and P. heterophyllus. ii. Potamogeton illinoensis Morong. Illinois Pondweed. Fig. 184. Potamogeton illinoensis Morong, C
RMRPEJ7W–. The American entomologist. Entomology. 174 THE AMERICAN ENTOMOLOGIST. NOTES ON THE EGGS AND hkUVM OF AN UNKNOWN DRAGON-FLY. BY W. R. GERARD, NEW YORK. In the month of July, 1S78, while row- ing on a small lake at Willowsmoe, on the Southern Catskills, my attention was at- tracted by a number of long gelatinous egg-masses of some animal unknown to me, and which were attached, in bunches of from 30 to 40, by one of their extremi- [Fig. 77.] Small portion of Egg-inass of Dragon-FIy, probably Diplax (after Gerard). ties, to the stems of Potamogeton, and floating horizontally near the surface of
RMRG5931–. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 138 CALIFORNIA FISH AND GAME ponchveed (Potamogeton gramineus, J', graminifolkis, and P. longi- pediculatus), averaging about 25 feet from shore.3 At times, the dense plant life lia.s hindered swimming, boating and fishing in the lake. A plankton Bample indicated an abundance of this basic food for the lake, particularly in water fleas (Daphnia) and copepods (Cyclops and Diaptomus). Various bottom and marginal foods were also abundant
RMRDJHAM–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. adnata (Fig. 73, stip). The stipules of the Tulip-tree serve as bud-^scales, falling ofT soon after the leaves unfold. 44. In the Dock and the Buckwheat family the stipules unite and form a sheath around the stem (Fig. 82), which is called Ochrea. If the outer margins only unite, as in the Buttonwood, a double stipule opposite the leaf is formed. If the inner margin only unite, as in the Pondweed (Potamogeton),
RMRHW9JD–. Bericht des Westpreussischen Botanisch-Zoologischen Vereins. Natural history. 53. Abb. 20. Heidetümpel im Werbliner Moor. Potamogeton natans, Helodea Canadensis, Hydrocharis morsus ranae, Callitriche- auctumnalis, Myriophyllum alterniflorum, Utricularia vulgaris (in einer kleinen anmoorigen Bucht) und hitorella uniflora. — In verschiedenen Heide- seen des Kreises Neustadt erscheint Nuphar pumilum als bemerkenswertes Glied der nordischen Assoziation. b) Landseen und Flüsse. Unter den wenigen, im Küstengürtel gelegenen, größeren Landseen ist der von Professor Caspary erforschte Zarnowitzer See
RMRDD7WE–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 324 USTILAGINEAE. to be preceded by a considerable resting-period, during which germination will not take place. D. Martianoffiana (Thiim.). In leaves of Potamogeton natans and P. gramineas. D. occulta (Hoffm.). In fruits of species of Potamogeton. D. intermedia (Setch.). An American species found on leaves of Sagittaria variabilis. D. comari (Berk.). In leaves of Comarum palustre in Britain. D. limosellae (Kunze.).
RMRDKC9F–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. July-Aug. 22. Potamogeton obtusifolius Mert. & Koch. Blunt-leaved Pondweed. Fig. 195. Potamogeton compressus Wahl. Fl. Suec. i: 107. 1824. Not L. 1753. Potamogeton obtusifolius Mert. & Koch, Deutsch. Fl. 1: 855. 1823. Stems usually slender, compressed, widely branch- ing, especially above. Leaves linear, 2'-$' long, ¥'-2" wide, obtuse, often mucron
RMRE3EWF–. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. TROPICAL AQUARIUM FISHES 179. Fig. 127. Potamogeton densus (Reduced one-half) Fig. 128. Nitella gracilis (Reduced one-third) POTAMOGETON In strong contrast to the foregoing dainty plants is Potamogeton densus, or pondweed. As will be seen from figure 127, these leaves are broad and robust. In color they are a bright green. This variety is said to be of European origin but is now common in ponds in the United States. If established in soil in flat pots it flourishes in a wel
RMRHM1FT–. A biological survey of the Erie-Niagara system. Supplemental to Eighteenth annual report, 1928. Natural history -- New York (State); Fishes -- Erie, Lake; Fishes -- Niagara River (N. Y. and Ont. ); Erie, Lake; Niagara River (N. Y. and Ont. ). 212 Conservation Department July 15 in one small stream, Tannery creek, which flows out of Lake Neatahwanta. This cold sluggish creek had beds of the pondweed, Potamogeton pectinatus growing along its border upon. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and a
RMRDKC7E–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 29. Potamogeton diversifolius Raf. Rafinesque's Pondweed. Fig. 202. Potamogeton hybridus Michx. Fl. Bor. Am. i: 101. 1803. Not Thuill. 1790. Potamogeton diversifolius Raf. Med. Rep. (II.) 5: 354. 1808. Potamogeton diversifolius multidenticulatus Mo- rong, Mem. Torr. Club, 3: Part 2, 48. 1893. Potamogeton diversifolius trichophyllus Morong, Mem. Torr. Club, 3: p
RMREDKRA–. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. 42 AQUATIC PLANTS of those plants forming a useful adjunct to the breeding of tropical fishes. It multiplies from short runners. Of a pleasing shade of light green, it makes a contrasting group among other plants in a large aquarium, but it shows to best advantage in a small aquarium by itself. It grows from 3 to 8 inches and is native to ponds in the Middle Atlantic and Southern States. Not often obtainable commercially.. Fig. 25. Potamogeton densus (Half size) Fig. 26. Nitella gracilis (
RMRDM8J5–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 2. Potamogeton Oakesianus Robbins. Oakes' Pondweed. Fig. 175. Potamogeton Oakesianus Robbins in A. Gray, Man. Ed. s, 48S. 1867. Stems very slender, often much branched from below. Floating leaves elliptic, mostly obtuse, rounded or slightly subcordate at the base, 1/-2' long, s"-9" wide, 12-20-nerved; petioles 2'-6' long; submerged leaves mere capilla
RMRDGXR6–. The natural history of the farm : a guide to the practical study of the sources of our living in wild nature . Natural history. Fig. 13. Leaf-form in three common sub- surrounding the stem at the nodes: a, the common water-weed (Elodea canadensis or Philotria canadensis); b, the water horn- wort (Ceratophyllum demersum); c, the water milfoil (Myrio- phyllum).. Fig. 14. Outlines of four common kinds of floating leaves: a, the floating river- weed (Potamogeton naians); b, the spatter-dock (Nymphaa advena); c, the white water- lily (Castaillia odorata); d, the water shield {Brasenia peltata)..
RMRDKC9P–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. ZANNICHELLIACEAE. Vol. I.. 20. Potamogeton Hillii Morong. Hill's Pond- weed. Fig. 193. Potamogeton Hillii Morong, Coult. Bot. Gaz. 6: 290. 1881. Stems slightly compressed, slender, widely branching, l°-2° long. Leaves linear, acute or cuspidate, or often almost aristate, i'-2l' long, i"-ii" wide, 3-nerved, the lateral nerves delicate and nearer the ma
RMRE0NHH–. Flowers of the field. Botany. POTAMOOETON NaTANS {floating Pond-weed) I. PoTAMOGETON (Pond-weed) 1. P. natans (Floating Pond-weed).— Upper leaves elliptical, ribbed, and cellular; lower, submersed, linear. An aquatic plant, with cord-like stems, propor- tioned to the depth of the water m which it grows ; smooth, floating leaver on long stalks ; and cylindrical spikes nt small green flowers, which rise above the surface of the water. The upper, 01 floating leaves, are 2-3 inches in length the lower, which are not always present are very narrow, and a foot long or more. Ponds and ditches ; com
RMRGWDCK–. Bulletin. Natural history; Natural history. 336 Illinois Natural History Survey Bulletin Vol. 27, Art. 4 persistent than that of the wild millet and is therefore available for waterfowl later in the season. Walter's millet was represented in 243 stomachs, table 38, and constituted 2.09 per cent of the total organic contents of all {gizzards. It is a jjood source of late- fall waterfowl food, it ranked fourteenth in the occurrence-percentage index, table 37. Sago Pondweed Potamogeton pectinatus Sago pondweed, fig. 16, according to Martin c^' Uhler (1939) is one of the most important duck food
RMRDKCAE–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. PONDWEED FAMILY. Si. 17. Potamogeton confervoides Reichb. Alga-like Pond weed. Potamogeton confervoides Reichb. Ic. Fl. Germ. & Helv. 7: 13- 1845. Potamogeton trichoides A. Gray, Man. 457. 1848. Not Cham. Potamogeton Tuckermani Robbins ; A. Gray, Man. Ed. 2, 434. 1856. Stems slender, terete, much branched, the upper branches repeatedly forking, 6'-
RMRDKCCR–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. ZANNICHELLIACEAE. Vol. I. 8. Potamogeton Faxoni Morong. Faxon's Pondweed. Fig. 181. Potamogeton Faxoni Morong, Mem. Torr. Club, 3: Part 2, 22. 1893. Floating leaves numerous, mostly obovate or oblanceolate, blunt-pointed or obtuse at the apex, narrowed at the base, often strikingly like those of P. varians, 2'-$' long, 8"-i2" wide, 13-17- nerved, on p
RMRDKC8F–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 84 ZANNICHELLIACEAE. Vol. I. 26. Potamogeton lateralis Morong. Opposite-leaved Pondweed. Fig. 199. Potamogeton lateralis Morong, Coult. Bot. Gaz. 5: Si. 1880. Stems filifoYm, much branched. Floating leaves on sterile shoots only, coriaceous, elliptic, obtuse, 4" 5" long, 1 "-2" wide, 5-7-nerved, the nerves deeply impressed beneath, usually i
RMRE5CP5–. Critical researches on the potamogetons. KUNGL. SV. VET. AKADEMIENS HANDLINGAE. BAND 55. N:0 5. 203 Though the specimens examined are devoid of spikes and fruits they differ from P. lucens, ziziiformis, and any other allied species so much that they cannot be mistaken for any of them. Distribution. South America: Parana, within the mouth-district of Rio Cubatao, gathered Vi 1912 by P. DusBN (hb. Stockholm.). Probably also in Brazil and Argentine. P. capeiisis Scheele apud Ar. Bennett, Bemer- kungen iiber die Arten der Gatt. Potamogeton etc., in Annalen Nat. Hofmus. Wien, 1892, 287 (nomen sol
RMRHHD3D–. Bodenkunde. Forest soils; Soils. Unter Wasser gebildete humose Ablagerungen. 181 Zerfall der Eiweißstoffe kann Schwefelwasserstoff bzw. Schwefeleisen gebildet werden. Vorgänge, an denen sich auch die Schwefelbakterien (Beggiatoaarten) stark beteiligen. In mäßiger Tiefe (bis 10 m Tiefe) finden sich geschlossene An- siedelungen von Algen (Vaucheria u. a.), denen in geringerer Tiefe Rasen von flutenden oder schwimmenden Pflanzen folgen (Elodea, Ceratophyllen. Potamogeton u. a.); hieran schließen sich die Pflanzen der Seerosen-Genossenschaft (Nupharetum), deren Blätter. Abb. 15. Verlandender See
RMRGWGRY–. Bulletin. Natural history; Natural history. RIVER. i Plankton Assoc./ Ohara Assoc.'' . 1 / Potamogeton Assoc OASTALlA-NYlffHAEA ASSOC? Ranunculus aquatllls oaplllaoeus Assoc. 1 OAREX ASSOC. PHRAGMITES-T rPHA ASSOC. . SOIRPUS VALIDUS ASSOC. SOIRPUS AMERICAHUS ASSOC. CLADIUU ASSOC. OALAMOGROSTIS CAMADENSIS ASSOC. I IRIS ASSOC."*^ / 'Osmunda Assoc. 1 LIATRIS SPICATA PRAIRIE ASSOC Diagram showing the successions exhibited between the plant associations In the Beach Area, Illinois. primary successions. secondary successions due to clearing, burning or other disturbing factors. Capital let
RMRE3ER6–. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. 188 AQUATIC PLANTS oxygenator. Of a pleasing shade of light green, it makes a contrast- ing group among other plants in a large aquarium, but it shows to best advantage in a small aquarium by itself. It grows from 3 to 8 inches and is native to ponds in the Middle Atlantic and Southern States. POTAMOGETON In strong contrast to the foregoing dainty plants is Potamogeton densus, or pondweed. As will be seen from illustration, these leaves are broad and robust. In color they a
RMRE0NH9–. Flowers of the field. Botany. RuppiA Maritima (Sea Ruppia). PETALOIDEiE necessary to describe their characters in an elementary work like this. 2. Ruppia I. R. maritima (Sea Ruppia).—The only species, growing in salt-water ditches ; distinguished from Potamo- geton pusillus by its spiral flower-stalks and long-stalked fruit.—Fl. July, Au- gust. 3. Zannichellia {Horned Pond-weed) I. Z. falustris (Horned Pond-weed). •—The only British species. A sub- mersed aquatic, with the habit of Potamogeton -pusillus, from which it may be well distinguished by its small, almost sessile, axillary flowers,
RMRGNN63–. Bulletin de l'Herbier Boissier. Plants. I. Caricetum, Carex stricta. II. Equiselo-phragmiletum, Equisetum limosum (assez rare), Phragmiles (abondant), Scirpus (manque). III. Mupharetuum, Nupbar luteum, Potamogeton natans. IV. Coupe E F. A droite de l'écoulement de la Simmi.. I. Caricetum. II. Phragmiteto-scirpetum, Phragraites (assez rare), Equisetum (manque), Scirpus lacuslris (abondant). III. Nupharetum, Nuphar luteum, Potamogeton natans rare. IV. Potamogetonetum, Potamogeton lucens.. Please note that these images are extracted from scanned page images that may have been digitally enhanced
RMRDKC8P–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 25. Potamogeton Vaseyi Robbins. Vasey's Pondweed. Fig. 198. Potamogeton Vaseyi Robbins in A. Gray, Man. Ed. 5, 485. 1867. Potamogeton Vaseyi var. latifolius Morong, Mem. Torr. Club, 3: Part 2, 44. 1893. Stems filiform, widely branching below, and with many short lateral branches above, i°-il° long, the emersed fertile forms in shallow water, and the more common
RMRDKCB3–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 15. Potamogeton perfoliatus L. Potamogeton perfoliatus L. Sp. PI. 126. 1753- Potamogeton perfoliatus lanceolatus Robbins in A. Gray, Man. Ed. 5, 488. 1867. Not Blytt 1861. Potamogeton perfoliatus Richardsonii A. Bennett, Journ. Bot. 27 : 25. 1889. Potamogeton Richardsonii Rydb. Bull. Torrey Club 32 : 599. 1905. Potamogeton bupleuroides Fernald, Rhodora 10 : 46.
RMRE39MW–. Practical botany. Botany. Fig. 360. Cross section of stem of pond- weed (Potamogeton) showing air passages u, much magnified. After Green 442. Characteristics of water plants. Those water plants which live wholly sub- merged generally differ far more in their form and structure from land plants than do those which (like many grasses and sedges) grow in very wet soil. From the situation in which they grow, submerged plants are less familiar to us than common land plants; but most people who know out-of-door things well, have seen pondweeds, water crowfoots, bladderworts (Fig. 362), mare's- ta
RMRDKC73–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 30. Potamogeton dimorphus Raf. Spiral Pondweed. Fig. 203. Potamogeton dimorphus Raf. Month. Mag. Crit. Rev. 1: 358. 1817. Potamogeton Spirillus Tuckerra. Am. Journ. Sci. (II.) 6: 228. 1848. Potamogeton Spirillus curvifolius Peck, N. Y. Stale Mus. Rep. 49: 28. 1896. Stems compressed, branched, 6'-2o' long, the branches often short and recurved. Floating leaves o
RMRDKCA9–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 17. Potamogeton confervoides Reichb. Alga-like Pond weed. Potamogeton confervoides Reichb. Ic. Fl. Germ. & Helv. 7: 13- 1845. Potamogeton trichoides A. Gray, Man. 457. 1848. Not Cham. Potamogeton Tuckermani Robbins ; A. Gray, Man. Ed. 2, 434. 1856. Stems slender, terete, much branched, the upper branches repeatedly forking, 6'-i8' long. Leaves very delicate
RMRDKC7T–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. PONDWEED FAMILY. 85 28. Potamogeton gemmiparus (Robbins) Morong. Fig. 201. Potamogeton pusillus var. (?) gemmiparus Rob- bins in A. Gray, Man. Ed. 5, 489. 1867. Potamogeton gemmiparus Morong, Coult. Bot. Gaz. 5 : 51. 1880. Stems filiform, terete, branching, 5-4° long. Leaves capillary, sometimes not as wide as the stem, often with no perceptible midrib
RMRDKC6K–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. PONDWEED FAMILY. S7. 33. Potamogeton pectinatus L. Fennel- leaved Pondweed. Fig. 206. Potamogeton pectinatus L. Sp. PI. 127. 1753. Stems slender, much branched, i°-3° long, the branches repeatedly forking. Leaves setaceous, atten- uate to the apex, i-nerved, i'-6' long, aften capillary and nerveless; stipules half free, l'-i' long, their sheaths scario
RMRDM8JA–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 76 ZANNICHELLIACEAE. Vol. I.. 2. Potamogeton Oakesianus Robbins. Oakes' Pondweed. Fig. 175. Potamogeton Oakesianus Robbins in A. Gray, Man. Ed. s, 48S. 1867. Stems very slender, often much branched from below. Floating leaves elliptic, mostly obtuse, rounded or slightly subcordate at the base, 1/-2' long, s"-9" wide, 12-20-nerved; petioles 2'-6' long;
RMRDKCAR–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. July-Sept. 16. Potamogeton mysticus Morong. Mystic Pond Pondweed. Fig. 189. Potamogeton mysticus Morong, Coult. Bot. Gaz. 5: 50. 1880. Whole plant very slender and delicate, stems irregularly branching above, nearly filiform, terete, i°-4° long. Leaves all submerged, scattered, oblong-linear, i'-ij' long, i"z" wide, 5-7-nerved, obtuse and rarely with
RMRDKC6E–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 33. Potamogeton pectinatus L. Fennel- leaved Pondweed. Fig. 206. Potamogeton pectinatus L. Sp. PI. 127. 1753. Stems slender, much branched, i°-3° long, the branches repeatedly forking. Leaves setaceous, atten- uate to the apex, i-nerved, i'-6' long, aften capillary and nerveless; stipules half free, l'-i' long, their sheaths scarious on the margins; peduncles f
RMRDM8H1–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. ZANNICHELLIACEAE. Vol. I. 8. Potamogeton Faxoni Morong. Faxon's Pondweed. Fig. 181. Potamogeton Faxoni Morong, Mem. Torr. Club, 3: Part 2, 22. 1893. Floating leaves numerous, mostly obovate or oblanceolate, blunt-pointed or obtuse at the apex, narrowed at the base, often strikingly like those of P. varians, 2'-$' long, 8"-i2" wide, 13-17- nerved, on p
RMRDKCB8–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. So ZANNICHELLIACEAE. Vol. I. 14. Potamogeton praelongus Wulf. White-stemmed Pondweed. Fig. 187. Potamogeton praelongus Wulf. in Roem. Arch. 3: 331- 1805. Stems white, flexuous, flattened, much branched, growing in deep water, sometimes 8° long. Leaves all submerged, oblong or oblong-lanceolate, semi- amplexicaul, bright green, 2'-i2' long, i'-ii' wide, with 3-5
RMRH44JF–. Brigham Young University science bulletin. Biology -- Periodicals. Biological Sebies, Vol. 18, No. 1 Peregrine Falcon in Utah 27 their vegetation is that at the delta of the Weber River (Ogden Bay), which, from salt flats to river channels, consists mainly of glasswort (Salicornia sp.), saltgrass, alkali bulrush (S. pahi(losus). hardstem bulrush (S. acutiis), cat- tail (T. latifoJia and T. angustifolia), and sago pondwecd (Potamogeton pectinatus) (Nelson, 1954). For a more comprehensive description of plant ecology in Utah marshes, see Nelson's (1954) studies of a marsh near the Great Salt L
RMRGW1JE–. Bulletin. Natural history; Natural history. Aug. 1981 Moran: Aquatic Macrophytes 407 lake, Station L4. This again was probably the result of stress by the wind and wave action in the area. The highest biomasses, 411.7 and 798.0 g/m2 were recorded from Station L2 in the discharge canal. In the intake arm, stations L7, LB, and L9, the mean biomass of 303.5 g/m^ was only 50 percent of that of the discharge arm. POTAMOGETON NODOSUS IN LAKE SANGCHRIS Potamogeton nodosus is common in Lake Sangchris, with a lakewide distribution in depths of 2 m or less. It is considered an alkophile, usually occur
RMRFRN2P–. Carnegie Institution of Washington publication. WRIGHT PLATE XIV . .„- ; , :. TREE-TOAD (HYLA VERSICOLOR). 1. A typical place for the breeding of tree-toads. 2. A male tree-toad croaking. Flash-light. 3. A male tree-toad hit on the head by hot flash-light powder. 4. Egg-packet of tree-toad eggs attached to Potamogeton leaves. 5. A series of tree-toads from tadpole to transformed tree-toad. Dorsal aspect. XI.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not per
RMRHAXYG–. Botanikai kzlemnyek. Plants; Plants -- Hungary. ÖKOLÓGIAI MEGPIGYELÉSEK 111 vizsgálására, illet?leg a további megfigyelésekre e növényt már fel nem használhattam, mert kénbaktériumok elszaporodása foly- tán, a harmadik esztend? telén, az akváriumot teljesen ki kellett ürítenem. De így is sikerült megállapítanom azt az okot, amely a növény alkalmazkodási képességét kedvez?tlenül befolyásolta. Miel?tt azonban ennek részletezésére térnék, szükségesnek tar- tom, hogy ismert ökológiai adatok segítségével megvizsgáljam,. I 1! I i ! I ! 10 211 30 cm 1. kép. A Potamogeton perfoliatus második esztend
RMRDKC87–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 27. Potamogeton pusillus L. Small Pondweed. Fig. 200. Potamogeton pusillus L. Sp. PI. 127. 1753. Potamogeton panormitanus Biv. Sic. PI. 1806-7. Potamogeton pusillus polyphyllus Morong, Coult. Bot. Gaz. 5 : 51. 1880. Potamogeton pusillus sturrockii A. Bennett in Hook. Stud. Fl. Ed. 3, 435. 1884. Potamogeton pusillus panormitanus Morong, Mem. Torr. Club, 3: Part
RMRGWCDM–. Bulletin. Natural history; Natural history. 242 ILLINOIS NATURAL HISTORY SURVEY BULLETIN Vol. 21, Art. 8 jacent to the Illinois River. These lakes were Douglas, near Chillicothe; Rice, Beebe and Goose, near Banner; Cuba Is- wine. Sawmill, Siebolt's and Billsbach, near Henry; Mud and Wightman's, near Sparland ; Upper and Lower Peoria, above. OOTEN BAY NEAR 5T0WN, ILLINOI S LUVIATILIS UTEA , LATIFOLIA A MUHLENBERG!) TON AMERICANUS POTAMOGETON PECTINATUS Fig. 8.—Vegetation map of Muscooten Bay, showing location of principal duck food bed' 1938. Muscooten Bay in 1938 had a scarcity of waterfowl
RMRHA0N5–. Botanisk tidsskrift. Plants; Plants -- Denmark. 227 stem, in P. undulatus the stem is compressed with a more or less deep ridge on each of the two broad sides [Fig, 1, B and Fig. 3, ^]; this characteristic form of the stem is also found in P. crispus [Fig. 1, C], but not in any other Danish form of Fotamogeton, and as far as I know, not in any other Potamogeton. A comparing examination of the structure of the stems and the leaves further proves, that the other parent must be P. praelongus and not P. perfoliatus. In P. undulatus numerous vascular bundles are found in the bark [Fig. 1, B, /A-]
RMRDM8HF–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 5. Potamogeton epihydrus Raf. Nuttall's Pondweed. Fig. 178. Potamogeton epihydrus Raf. Med. Repos. II. 5 : 354. 1808. Potamogeton Nuttallii Cham. & Schl. Linnaea, 2: 226. pi. 6. f. 25. 1827. Potamogeton Claytonii Tuckerm. Am. Journ. Sci. 45: 38. 1843. Stems slender, compressed, i°-6° long. Float- ing leaves opposite, elliptic to obovate, obtuse, short-petio
RMRDCNJG–. The natural history of the farm; a guide to the practical study of the sources of our living in wild nature. Natural history. Pig. 13. Leaf-form in three common sub- merged plants whose leaves ^ow in whorls surrounding the stem at the nodes: a, the common water-weed (Elodea canadensis or Philotria canadensis); 6, the water horn- wort (Ceratophyllum demersum); c, the water milfoil (MyriO' phyUum).. Fig. 14. Outlines of four common kinds of floating leaves: a, the floating river- weed (Potamogeton natans); 6, the spatter-dock {Nymphaa advena); c, the white water- lily iCastoillia odorata); d,
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