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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 erect, or prostrate; 5–15 cm long. Ligule a fringe of hairs.
INFLORESCENCE Dioecious. Inflorescence composed of racemes.
Racemes borne along a central axis; unilateral. Rhachis deciduous from axis; flattened; terminating in a barren extension; extension bristle-like. Spikelet packing 2 -rowed.
Spikelets pectinate; solitary. Fertile spikelets pedicelled. Male spikelets sessile. Pedicels oblong.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; dorsally compressed; 8–10 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 0.66–0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute. Upper glume lanceolate; membranous; without keels; 2–5 -veined. Upper glume apex acute.
FLORETS Fertile florets female. Fertile lemma elliptic; cartilaginous; without keel; wingless; 3 -veined. Lemma surface unwrinkled; with 2 longitudinal grooves. Lemma apex awned; 3 -awned. Lateral lemma awns shorter than principal. Palea 1 length of lemma. Palea apex awned. Apical sterile florets 3 in number; barren; in a clump; linear. Apical sterile lemmas awned.
FLOWER Lodicules 2; fleshy. Anthers 3.
FRUIT Caryopsis with adherent pericarp; ellipsoid. Embryo 0.9 length of caryopsis.
MALE Male inflorescence similar to female; of racemes along a central axis; with pectinate racemes. Male spikelets distinct from female; lanceolate. Male spikelet glumes 2; muticous. Male spikelet lemma muticous.
DISTRIBUTION North America.
Please cite this publication as detailed in How to Cite Version: 16th November 2012.