Note - this takes you off
of our website
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; scaly. Culms 150–230 cm long. Leaf-sheaths 8–15 cm long; glabrous on surface, or pubescent. Ligule a fringe of hairs; 0.75–1 mm long. Leaf-blades flat, or involute; 30–65 cm long; 5–12 mm wide. Leaf-blade apex filiform.
INFLORESCENCE Inflorescence a panicle.
Panicle open, or contracted; linear, or lanceolate, or ovate; 15–78 cm long; 1.7–26 cm wide. Primary panicle branches appressed, or spreading, or reflexed; 15–30 cm long.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5–8.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.6–0.9 length of lemma.
GLUMES Glumes persistent; similar; exceeding apex of florets. Lower glume ovate; 3.5–6.5 mm long; 0.7–0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume ovate; 5–8.2 mm long; 1.1–1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
FLORETS Fertile lemma obovate; 4.5–7.1 mm long; membranous; keeled; 1 -veined. Lemma surface glabrous. Lemma apex acute. Palea oblong; 1.1 length of lemma; 2 -veined. Palea keels distant but flanking a median depression; eciliate.
FLOWER Anthers 3; 3–5 mm long.
FRUIT Caryopsis with free soft pericarp.
DISTRIBUTION North America: western Canada, eastern Canada, northwest USA, north-central USA, and northeast USA.
NOTES Eragrostideae. Thieret.
Please cite this publication as detailed in How to Cite Version: 16th November 2012.