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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Trisetaria chaudharyana

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.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong, or obovate; 1.5–2.5 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE 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.

GLUMES 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.

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.

FLOWER Lodicules 2; 0.4 mm long; membranous. Anthers 3; 0.5–0.9 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Endosperm farinose.

DISTRIBUTION Asia-temperate: Arabia.

NOTES Aveneae. Scholz 1997.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.