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GrassBase - The Online World Grass Flora
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
HABIT Annual; caespitose. Culms erect, or geniculately ascending; 30–90 cm long. Ligule an eciliate membrane. Leaf-blades 10–20 cm long; 2–8 mm wide.
INFLORESCENCE Inflorescence a panicle.
Panicle spiciform; ovate; 1.5–4 cm long; 0.8–1.8 cm wide.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; laterally compressed; compressed strongly; 6.3–8.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume elliptic; 6.3–8.5 mm long; 1 length of upper glume; chartaceous; 1-keeled; winged on keel; winged above; 3 -veined. Lower glume surface glabrous, or pilose. Lower glume apex acute. Upper glume elliptic; 6.3–8.5 mm long; 1.4–1.5 length of adjacent fertile lemma; chartaceous; 1-keeled; winged on keel; winged above; 3 -veined. Upper glume surface glabrous, or pilose. Upper glume apex acute.
FLORETS Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 0.6–1.2 mm long; 0.1–0.2 length of fertile lemma; fleshy; acute. Fertile lemma elliptic; laterally compressed; 4.5–5.5 mm long; cartilaginous; shiny; keeled; 5 -veined. Lemma surface pubescent. Lemma apex acute. Palea cartilaginous; 2 -veined; without keels. Palea surface pubescent.
FLOWER Anthers 3. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; 3.5–3.9 mm long. Hilum linear.
DISTRIBUTION Europe: southwestern and southeastern. Africa: north and Macaronesia. Asia-temperate: Caucasus and western Asia. Asia-tropical: Papuasia. North America: northwest USA, southwest USA, and south-central USA.
NOTES Aveneae. Anderson.
Please cite this publication as detailed in How to Cite Version: 16th November 2012.