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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. Stolons present. Culms 5–10 cm long. Ligule a fringe of hairs.
INFLORESCENCE Monoecious, or dioecious. Inflorescence composed of racemes; subtended by an inflated leaf-sheath; embraced at base by subtending leaf.
Racemes paired; globose; unilateral; bearing few fertile spikelets; bearing 3–5 fertile spikelets on each. Rhachis obsolete; deciduous from axis.
Spikelets solitary. Fertile spikelets sessile. Male spikelets sessile.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 3–4 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes one the lower absent or obscure, or two; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 0–0.5 length of upper glume; membranous. Lower glume surface without pits. Upper glume ovate; indurate; without keels; 7 -veined. Upper glume apex lobed; 3 -fid; acuminate.
FLORETS Fertile florets female. Fertile lemma ovate; dorsally compressed; membranous; without keel; wingless; 3 -veined. Lemma surface unwrinkled; without grooves. Lemma apex lobed; 3 -fid; incised 0.5 of lemma length. Palea 0.5 length of lemma; 2 -veined. Palea keels scaberulous.
FLOWER Anthers 3.
FRUIT Caryopsis oblong, or ovoid. Embryo 0.9 length of caryopsis.
MALE Male inflorescence terminal; unlike female; of racemes along a central axis; with pectinate racemes. Male spikelets distinct from female; ovate. Male spikelet glumes 2. Male spikelet lemma muticous.
DISTRIBUTION North America.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.