Poaceae
Aristida

Aristida ramosa R.Br.

First published in Prodr. Fl. Nov. Holland.: 173 (1810)
This species is accepted
The native range of this species is E. & SE. Australia. It is a perennial and grows primarily in the subtropical 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; clumped loosely. Culms erect; 37-103 cm long; 2 -noded. Culm-internodes smooth; distally glabrous. Lateral branches ample. Leaf-sheath oral hairs lacking, or ciliate; 1.2-2.2 mm long. Ligule a fringe of hairs; 0.5-1 mm long. Collar glabrous, or pubescent. Leaf-blades involute; 6-12 cm long; 0.6-2 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous, or pubescent; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; lanceolate; 8-27 cm long; 1.5-6 cm wide. Primary panicle branches 2-5 cm long; bearing spikelets almost to the base. Panicle branches with insignificant pulvini. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 6-14 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.5-1.2 mm long; pubescent; acute.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 6-14 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.5-1.2 mm long; pubescent; acute.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 3.7-9 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1(-3) -veined. Lower glume primary vein smooth to scabrous. Lower glume lateral veins absent, or obscure. Lower glume surface smooth to scabrous. Lower glume apex acute, or acuminate. Upper glume lanceolate; 5.2-10.7 mm long; 0.7-0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface smooth to scabrous. Upper glume apex obtuse to acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; subterete; 6-14 mm long; coriaceous; pallid, or light brown; concolorous, or mottled with last colour; without keel; 3 -veined. Lemma surface smooth, or scaberulous, or papillose. Lemma margins involute, or convolute; covering most of palea. Lemma apex acute; awned; 3 -awned. Principal lemma awn straight, or curved; spreading; flat below; with 8-20 mm long limb; without a column; persistent. Lateral lemma awns spreading as much as principal; 7-17 mm long; shorter than principal. Palea 0.2 length of lemma; without keels.
Morphology Reproductive morphology Flowers
Anthers 3; 1.3-1.9 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; without sulcus, or sulcate on hilar side; 5-8.7 mm long. Hilum linear; 0.5 length of caryopsis.
Distribution
Australasia: Australia and New Zealand. Pacific: southwestern.
Reference
Aristideae. Simon 1993.
[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