Trisetaria chaudharyana H.Scholz

First published in Willdenowia 21: 185 (1991)
This species is accepted
The native range of this species is Arabian Peninsula. It is an annual and grows primarily in the desert or dry shrubland biome.

Descriptions

Morphology General Habit
Annual. Culms 5-12 cm long. Culm-internodes distally glabrous. Leaf-sheaths hirsute. Ligule an eciliate membrane; 1-2 mm long. Leaf-blades lanceolate; 2-3 cm long; 1-3 mm wide. Leaf-blade surface pubescent; sparsely hairy. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; oblong, or obovate; 1.5-2.5 cm long. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.3-0.6 mm long; pilose. Floret callus pubescent. Floret callus hairs 0.1-0.2 mm long.
Fertile
Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.3-0.6 mm long; pilose. Floret callus pubescent. Floret callus hairs 0.1-0.2 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; shiny; gaping. Lower glume lanceolate; 4-5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4-5 mm long; 0.8-1 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 5 mm long; membranous; keeled; 5 -veined. Lemma surface scabrous. Lemma margins eciliate, or pubescent. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn dorsal; curved, or geniculate; 8-9 mm long overall; without a column, or with a straight or slightly twisted column. Lateral lemma awns arising on apex of lobes; 0.8-1.3 mm long; shorter than principal. Palea gaping; 4 mm long; hyaline. Palea apex lobed; 2 -fid; awned; awns 2 mm long. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.4 mm long; membranous. Anthers 3; 0.5-0.9 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform. Endosperm farinose.
Distribution
Asia-temperate: Arabia.
Reference
Aveneae. Scholz 1997.
[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: 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

    • 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