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Genus :

IMPERATA

Family :

POACEAE

Description


Perennial, rhizomatous grasses. Culms 10-280 cm high, nodes hairy or glabrous. Leaves mostly basally aggregated, blades broad or narrow, pseudo-petiolate, ligule a fringed membrane. Inflorescence a silky, spiciform or loosely contracted panicle, spicate, espatheate. Spikelets paired, not secund, unequally pedicellate,  2.5-5.0 mm long, compressed dorsiventrally, falling with glumes, callus hairy, silvery; glumes 2, more or less equal, awnless, similar; lower glume convex, 5-7 nerved; upper glume 3-5 nerved; lemmas reduced, sometimes absent, less firm than glumes, hyaline, 0-1 nerved, glabrous; paleas apically notched. Lodicules absent. Stamens 1 or 2. Caryopsis free.

Key to the species

Serial Key Reference
1a. Panicle 40-60 cm long; culms up to 2.8 m tall; nodes glabrous; leaf-blades broader I. latifolia
1b. Panicle 6-20 cm long; culms up to 1.2 m tall; nodes hairy; leaf-blades narrower I. cylindrica var. major