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Smooth Nut-Rush
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Smooth Nut-Rush
P Native Photo: Preetha P.S.
Common name: Smooth Nut-Rush
Botanical name: Scleria oblata    Family: Cyperaceae (Sedge family)
Synonyms: Scleria laevis

Smooth Nut-Rush is an erect clustered, perennial herb, 50-100 cm tall. Stem is 3-angled, smooth. Leaves are scattered all along the stem, linear, 9 mm wide, margins rough, gradually narrowed to an pointed tip; sheaths narrow, 7-12 cm long, 3-angled, not winged, mouth brown, finely velvet-hairy; contraligule reddish, fringed with hairs, 1-2 mm long, blunt. Flowers are borne in 1 panicle at branch-end and 2-5 lateral. Flower-cluster-stalks are shortly exerted from the sheaths; primary bracts leaf-like, exceeding the inflorescence, secondary ones smaller, bristly. Spikelets are unisexual, brown; male spikelets stalked, oblong, 3.5 mm long; female spikelets ovoid, 4-4.5 mm, male part represented by a single glume; glumes 3-4, ovate-pointed, 4 mm long, 1-nerved. Stamens 3, anthers 1.5 mm long. Nut is spherical, oblate, depressed tip, 2.2-2.5 x 2.5-3 mm, hairless, smooth, shining white, shorter than the subtending glume. Smooth Nut-Rush is found in Tropical Asia.

Identification credit: Preetha P.S. Photographed in Palode, Thiruvananthapuram, Kerala.

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