Poaceae
Amphibromus

Amphibromus neesii Steud.

First published in Syn. Pl. Glumac. 1: 328 (1854)
This species is accepted
The native range of this species is SE. Australia. It is a perennial and grows primarily in the temperate biome.

Descriptions

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
[AERP]

Morphology General Habit
Perennial; caespitose. Rhizomes absent, or elongated. Butt sheaths distinctly ribbed; glabrous. Culms erect; 80-150 cm long; 1-2.5 mm diam.; 2-4 -noded. Culm-internodes terete, or elliptical in section; ridged. Culm-nodes glabrous. Leaf-sheaths ribbed; smooth, or scaberulous. Ligule an eciliate membrane; 6.5-8 mm long; acute. Leaf-blades flat, or involute; 15-37 cm long; 2-4 mm wide. Leaf-blade surface ribbed; grooved adaxially and abaxially; smooth to scabrous; pubescent; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; 15-37 cm long. Primary panicle branches 1-3 -nate; 7-14 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 10-20 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-5 fertile florets; with a barren rhachilla extension, or with diminished florets at the apex. Spikelets oblong; laterally compressed; 8-14 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2-5 fertile florets; with a barren rhachilla extension, or with diminished florets at the apex. Spikelets oblong; laterally compressed; 8-14 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 3.8-6.3 mm long; 0.6-0.8 length of upper glume; membranous; much thinner on margins; 1-keeled; 3-5 -veined. Lower glume apex acute. Upper glume lanceolate; 6.4-7.5 mm long; 1.1 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 5-7 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 5.9-8.4 mm long; cartilaginous; without keel; 5-7 -veined. Lemma midvein ciliolate. Lemma surface scabrous, or papillose. Lemma apex dentate; 2(-4) -fid; with outer lobes shorter; with lobes 0.26-0.36 mm long; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66-0.75 way up back of lemma; geniculate; 13.8-25.5 mm long overall; with 9-17.5 mm long limb; with twisted column. Column of lemma awn 4.8-6.5 mm long; scabrous; hirtellous. Palea 0.8-0.9 length of lemma. Palea keels ciliate. Palea surface papillose. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; 1.3-2.3 mm long; membranous; glabrous; acute. Anthers 3; 1.3-2.3 mm long; eventually exserted, or retained within floret. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 2-3 mm long; light brown; glabrous. Embryo 0.1-0.2 length of caryopsis. Hilum linear; 0.35-0.45 length of caryopsis.
Distribution
Australasia: Australia.
Reference
Aveneae. Jacobs & Lap 1994.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0