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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; caespitose. Culms erect; 60–100 cm long. Ligule an eciliate membrane, or a ciliolate membrane; 1–3 mm long. Leaf-blades involute; 15–50 cm long; 1–4 mm wide; stiff. Leaf-blade surface ribbed; scabrous; rough adaxially. Leaf-blade apex filiform.
INFLORESCENCE Inflorescence a panicle.
Panicle spiciform; linear; continuous, or interrupted; 30–60 cm long. Primary panicle branches 1–4 cm long.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; compressed slightly; 2.5–3.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture. Lower glume lanceolate; 2–3 mm long; 1 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex obtuse, or acute. Upper glume lanceolate; 2–3 mm long; 0.8 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex obtuse, or acute.
FLORETS Fertile lemma elliptic; 2.5–3.5 mm long; membranous; without keel; 3 -veined. Lemma midvein pubescent; hairy above. Lemma surface scaberulous; rough above. Lemma margins pubescent; hairy below. Lemma apex obtuse, or acute; muticous, or mucronate. Palea 1 length of lemma; 2 -veined. Palea surface scabrous.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 1.5–1.7 mm long.
FRUIT Caryopsis with adherent pericarp; fusiform; 2 mm long.
DISTRIBUTION North America: southwest USA, south-central USA, and Mexico.
NOTES Eragrostideae. WDC.
Please cite this publication as detailed in How to Cite Version: 16th November 2012.