Dinebra panicea (Retz.) P.M.Peterson & N.Snow

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: not threatened. Confidence: confident

Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit

Tufted annual; culms 25–110 cm. high, slender, geniculately ascending.

Morphology Leaves

Leaf-blades linear, flat, up to 25 cm. long, 7 mm. wide, long-attenuate; leaf-sheaths and both surfaces of the blades papillate-pilose, the hairs spreading.

Morphology Reproductive morphology Inflorescences

Inflorescence elliptic to oblong, brush-like, often purplish, 20–30 cm. long, composed of numerous straight slender ascending racemes 4–11 cm. long scattered along the central axis.

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets 2–5(usually 3)-flowered, narrowly elliptic, 1.9–2.5 mm. long, overlapping; glumes subequal, shorter than the lemmas, lower glume lanceolate, 0.7–1.5 mm. long, acute, upper glume narrowly oblong, 0.9–1.6 mm. long, obtuse and mucronate; lemmas elliptic-oblong, 0.8–1.2 mm. long, minutely hairy on the back, bluntly 2-toothed.

Morphology Reproductive morphology Fruits

Caryopsis broadly elliptic, 0.5 mm. long, brown, obtusely trigonous in cross-section.

Figures

Fig. 76, p. 280.

Habitat

Deciduous bushland, wooded grassland, also plantations, roadsides and waste places; 0–300 m.

Distribution

K7 P T3 T6 T8 U2 Z from Sudan to Transvaal and Natal, W. Africa, also tropical Asia

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit

Annual up to 110 cm high; leaves linear, long-attenuate

Morphology Reproductive morphology Inflorescences

Inflorescence 20–30 cm long, composed of numerous straight, slender ascending racemes each 4–11 cm long, scattered along the main axis and bearing clearly secund spikelets

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets 1.9–2.5 mm long, 2- to 5-flowered (usually 3-flowered), laterally compressed; lower glume 0.7–1.5 mm long; upper glume 0.9–1.6 mm long; lemma 0.8–1.2 mm long, keeled, minutely hairy on the back, bluntly 2-toothed

Morphology Reproductive morphology Fruits

Caryopsis broadly elliptic, trigonous in cross-section.

Distribution

S3; tropical Africa and tropical Asia.

Note

The single collection from Somalia, cited as L. filiformis by Chiovenda, Res. Sci. Miss. Stefanini-Paoli: 227 (1916), has not been seen and the record needs confirmation. L. filiformis is a South American species, but L. panicea was previously often misidentified as this.

Morphology General Habit

Annual; caespitose. Butt sheaths herbaceous; green. Culms decumbent; 25-110 cm long. Leaf-sheaths pilose. Ligule an eciliate membrane. Leaf-blades 3-25 cm long; 1.5-7 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy on both sides; with tubercle-based hairs. Leaf-blade apex attenuate.

Morphology Reproductive morphology Inflorescences

Inflorescence composed of racemes. Racemes numerous; borne along a central axis; straight; unilateral; 4-11 cm long. Central inflorescence axis 20-30 cm long. Rhachis semiterete. Spikelet packing broadside to rhachis; regular; 2 -rowed. Spikelets solitary. Fertile spikelets sessile.

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets comprising 2-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 1.9-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas.

Fertile

Spikelets comprising 2-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 1.9-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas.

Morphology Reproductive morphology Inflorescences Bracts Glume

Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; 0.7-1.5 mm long; 0.8-0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic; 0.9-1.6 mm long; 1.1-1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse; mucronate.

Morphology Reproductive morphology Flowers Florets

Fertile lemma oblong; 0.8-1.2 mm long; membranous; keeled; 3 -veined. Lemma midvein pubescent. Lemma lateral veins close to margins. Lemma surface puberulous. Lemma margins pubescent. Lemma apex dentate; 2 -fid; obtuse. Palea 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

Morphology Reproductive morphology Flowers

Anthers 3; oblong; 0.2-0.3 mm long.

Morphology Reproductive morphology Fruits

Caryopsis with adherent pericarp; ellipsoid; isodiametric; trigonous; 0.5 mm long; dark brown.

Distribution

Africa: north, west tropical, west-central tropical, northeast tropical, east tropical, southern tropical, south, and western Indian ocean. Asia-temperate: western Asia, Arabia, China, and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: northwestern. North America: north-central USA, northeast USA, southwest USA, south-central USA, southeast USA, and Mexico. South America: Mesoamericana, Caribbean, northern South America, western South America, Brazil, and southern South America.

Reference

Eragrostideae. FTEA.

Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit

Erect or ascending annual about 60 cm. high

Morphology Reproductive morphology Inflorescences

Slender racemes

Ecology

Old farmland and weedy places.

Distribution

Biogeografic region: Andean, Caribbean, Orinoquia. Elevation range: 0–2000 m a.s.l. Native to Colombia. Colombian departments: Antioquia, Atlántico, Bolívar, Casanare, Cauca, Cesar, Córdoba, Cundinamarca, Huila, La Guajira, Magdalena, Santander, Tolima, Valle del Cauca.

Habit

Herb.

Conservation

IUCN Red List Assessment (2021): LC.

Ecology

Habitat according IUCN Habitats Classification: wetlands (inland), artificial - terrestrial.

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/164493/5891942

Conservation

LC - least concern

Gramineae, T. Cope. Flora Zambesiaca 10:2. 1999

Morphology General Habit

Slender annual up to 100 cm tall, erect or geniculately ascending; ligule a short membrane; leaf lamina 4–24 cm × 1–8 mm, linear, flat, long-attenuate at the apex; sheaths and both surfaces of the lamina tuberculate-pilose, the hairs spreading.

Morphology Reproductive morphology Inflorescences

Inflorescence 9–36 cm long, ± cylindrical, brush-like; racemes numerous, slender, 2–14 cm long, ascending, straight.

Morphology Reproductive morphology Inflorescences Spikelets

Spikelets laterally compressed, 2–4-flowered, 1.8–2.3(2.5) mm long, narrowly elliptic, overlapping; glumes unequal, the inferior 0.9–1.2(1.6) mm long, lanceolate, acute, the superior 1–1.7 mm long, narrowly oblong, obtuse and mucronate; lemmas 0.9–1.2 mm long, elliptic-oblong, keeled, minutely pilose on the back, bluntly 2-toothed at the apex.

Morphology Reproductive morphology Fruits

Caryopsis 0.4–0.6 mm long, broadly elliptic, obtusely trigonous in section.