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Pennisetum pedicellatum Trin.
Family: Poaceae, Tribe: Paniceae
Common names: kyasuma grass, kyasuwa grass
Fertile floret, or involucre of bristles enclosing 1-3(5) spikelets; disarticulation below involucre.
Spikelet cluster subtended by involucre of 15-25 unfused bristles; bristles antrorsely barbed and plumose, 5-30 mm long, with one conspicuously longer bristle, surrounded by outer ring of shorter smooth bristles. Spikelet cluster of 1 sessile and usually at least 1 pedicellate spikelet. Spikelets of 1 fertile floret and 1 basal sterile floret. Spikelets lanceolate, slightly dorsally compressed, 3.4-6 mm long, 0.6-1 mm wide. Glumes hyaline to membranous; lower glume reduced, upper glume and sterile lemma as long as spikelet; sterile lemma trilobed. Fertile floret lanceolate, 2-3 mm long, 0.6-1 mm wide; fertile lemma and palea coriaceous, glossy, translucent, fertile lemma 5-nerved. Caryopsis lanceolate, dorsally compressed, 0.5-2.5 mm long.
Pennisetum pedicellatum belongs to a unique section of the genus with a trilobed sterile lemma. P. pedicellatum spikelets are in clusters of 1-3(5) in the involucre, lower glume length is at least 50% of spikelet. See
Pennisetum clandestinum Hochst. ex Chiov.
Pennisetum macrourum Trin.
Pennisetum polystachion (L.) Schultes.
Tropical Africa, South Africa, Asia (India, Malaysia, Philippines, Thailand), Australia, Fiji, United States.
Drier sites, savannahs and woodland margins; a weed in croplands, grasslands, waste places.
Pennisetum pedicellatum is an erect or geniculate annual or perennial grass, to 150 cm tall. It has been introduced as a pasture grass in Asia, Australia and the Americas. However, it invades croplands and cleared lands, and is difficult to eradicate.