Poaceae
Enneapogon

Enneapogon avenaceus (Lindl.) C.E.Hubb.

First published in Bull. Misc. Inform. Kew 1934: 450 (1934)
This species is accepted
The native range of this species is Australia. It is an annual or perennial and grows primarily in the seasonally dry tropical 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
Annual, or perennial. Culms 7-45 cm long. Lateral branches lacking, or sparse. Ligule a fringe of hairs. Leaf-blades flat, or involute; 1-3 mm wide. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle antrorsely scabrous above. Panicle contracted, or spiciform; linear to ovate; 3-9 cm long; 1-3 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4-13.6 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 4-13.6 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; 4-13.6 mm long; 0.8 length of upper glume; membranous; without keels; 11-23 -veined. Lower glume surface glabrous, or pilose. Lower glume apex obtuse to acuminate. Upper glume ovate; 4-13.6 mm long; 2-4 length of adjacent fertile lemma; membranous; without keels; 11-23 -veined. Upper glume surface glabrous, or pilose. Upper glume apex obtuse to acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblate; 1.8-3.5 mm long; coriaceous; firmer above (knuckled); much thinner on margins; without keel; 9-11 -veined. Lemma lateral veins obscure. Lemma surface pilose; hairy below; inner surface transversely fringed. Lemma apex dentate; 9 -fid; awned; 9 -awned. Principal lemma awn 7-11 mm long overall; limb plumose; with 1-1.3 mm long hairs; glabrescent towards tip. Lateral lemma awns arising on apex of lobes; subequal to principal; of unequal width; ciliate. Palea 1.1 length of lemma; membranous. Palea keels ciliate; adorned above. Palea surface pilose; hairy on back and on flanks; hairy above. Palea apex emarginate, or truncate. Apical sterile florets 1-2 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 orbicular; concavo-convex; 1-1.6 mm long. Hilum punctiform.
Distribution
Australasia: Australia.
Reference
Pappophoreae. Kakudidi.
Diagnostic
Lemma hairs exceeding base of awns.
[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

    • '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