Morphology

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Description

Annuals, or biennials. Culms ascending, 30-70 cm tall, 3.5 mm wide. Leaf-blades chartaceous, linear, 5-18 cm long, 2-5.5 mm wide, sharp at apex, veins conspicuous, puberulous above, villous beneath. Sheath loosely villous. Ligule membranous, tongue-shaped, rounded at apex, 3 mm long. Inflorescence an open panicle, 7-20 cm long. Spikelets with 4-8 florets, elliptical, 45 mm long, 4 mm wide, slightly laterally compressed. Pedicels minutely hispid. Lower glumes chartaceous, glabrous or loosely strigose, linear-lanceolate, sharp at apex, 20 mm long, 1 -nerved. Upper glumes subcoriaceous, lanceolate, sharp at apex, 15-30 mm long, longer than 10 mm, 3 -nerved, minutely strigose. Florets 22-32 mm long, with rachilla. Lemmas subcoriaceous, lanceolate, margins inrolled, shortly bilobed at apex, 22-32 mm long, longer than 20 mm, with awn, with a awn longer than lemma, 5-7 -nerved, hairy, densely pubescent on back surface. Paleas membranous, linear oblong, round or truncate at apex, 12-16 mm long, 2 -nerved, ciliate on nerves. Callus glabrous. Anthers 2 mm long. Caryopsis linear-oblong, 10 mm long, hilum linear.

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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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