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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 Perennial. Rhizomes elongated. Culms erect; 15–40 cm long. Lateral branches lacking. Ligule an eciliate membrane.
INFLORESCENCE Inflorescence a panicle.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 5.5–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus glabrous.
GLUMES Glumes persistent; shorter than spikelet; firmer than fertile lemma. Lower glume ovate; 0.66–0.75 length of upper glume; cartilaginous; 1-keeled; 3 -veined. Lower glume surface without pits. Lower glume apex acuminate. Upper glume ovate; 1.25–1.5 length of adjacent fertile lemma; cartilaginous; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acuminate.
FLORETS Fertile lemma lanceolate; membranous; much thinner above; keeled; wingless; 5–7 -veined. Lemma surface unwrinkled; without grooves; pubescent. Lemma apex erose; acute. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; membranous. Anthers 3.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform.
DISTRIBUTION North America.
Please cite this publication as detailed in How to Cite Version: 16th November 2012.