Poaceae

Oxychloris Lazarides

First published in Nuytsia 5: 283 (1985)
This genus is accepted
The native range of this genus is Australia.

Descriptions

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Morphology General Habit
Annual, or perennial. Culms 15-47 cm long. Ligule a ciliolate membrane. Leaf-blade margins cartilaginous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes digitate; unilateral. Rhachis angular. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; pubescent; pungent.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; pubescent; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet; thinner than fertile lemma; gaping. Lower glume elliptic; 0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 1.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume apex emarginate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma obovate; coriaceous; much thinner on margins; keeled; winged on margins; 3 -veined. Lemma midvein ciliate. Lemma margins ciliate. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn subapical. Palea 1 length of lemma. Palea keels winged; ciliolate. Apical sterile florets 3-5 in number; barren; in a clump; flabellate. Apical sterile lemmas awned.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; obovoid; trigonous. Embryo 0.5-0.75 length of caryopsis. Hilum elliptic.
Distribution
Australasia.
[GB]

Sources

  • 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

  • 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