Poaceae
Enneapogon

Enneapogon purpurascens (R.Br.) P.Beauv.

First published in Ess. Agrostogr.: 162 (1812)
This species is accepted
The native range of this species is N. Western Australia to Northern Territory. It is an annual or perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Annual, or perennial. Culms 6-75 cm long. Leaf-sheaths longer than adjacent culm internode. Ligule a fringe of hairs. Leaf-blades curled; 1-3 mm wide; glaucous. Leaf-blade surface scabrous. Leaf-blade apex attenuate; filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle antrorsely scabrous above. Panicle spiciform; linear to oblong; 1.5-11 cm long; 1-1.5 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 3.5-5.5 mm long; 1 length of upper glume; membranous; without keels; 7-11 -veined. Lower glume surface pilose. Lower glume apex erose; acute, or acuminate. Upper glume ovate; 3.5-5.5 mm long; 2 length of adjacent fertile lemma; membranous; without keels; 7-11 -veined. Upper glume surface pilose. Upper glume apex erose; acute, or acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma orbicular; 1.6-2.5 mm long; coriaceous; without keel; 9 -veined. Lemma lateral veins obscure. Lemma surface pilose; hairy below; inner surface transversely fringed. Lemma margins eciliate, or ciliolate. Lemma apex dentate; 9 -fid; awned; 9 -awned. Principal lemma awn 4-5 mm long overall; 2 length of lemma; limb plumose; glabrescent towards tip. Lateral lemma awns arising on apex of lobes; subequal to principal; of unequal width (outer wider); plumose. Palea membranous. Palea keels ciliolate; adorned above; with 0.5-0.66 of their length adorned. Palea surface pubescent; hairy on back; hairy below. Apical sterile florets 2-4 in number; barren. Apical sterile lemmas awned; 9 -awned. Apical sterile lemma awns ciliate.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid, or obovoid; concavo-convex; 1-2 mm long. Hilum punctiform.
Distribution
Australasia: Australia.
Reference
Pappophoreae. Kakudidi.
Diagnostic
Lemma hairs less than base of awns.
[GB]

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]

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

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • 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