Fimbristylis acuminata Vahl, Enum. Pl. 2: 285. 1805.

Type.

India, König s.n. [holotype: C, (C10010413 image!)].

Description.

Plant annual, tufted. Culm terete, up to 22 cm long. Leaf reduced to the bladeless sheath. Involucral bract absent. Inflorescence terminal with a single erect or slightly nodding spikelet. Spikelet lanceolate-ovoid, 5-10 × 1.5-3 mm. Glumes pale green or brown-tinged, ovate, 3-4 × 2-2.5 mm, apex obtuse and mucronate. Style flattened, apically ciliate, 2.5 mm long. Stigmas 2, ciliate. Stamens 2, as long as glumes. Achene brownish-black, obovoid, 1.5 × 1-1.5 mm, biconvex, with 6-7 rows of transversely wavy reticulation in each face, pitted with hexagonal cells, shortly stipitate. (Fig. 2B).

Distribution.

Nepal (new record), Bhutan, India, China, Bangladesh, Sri Lanka, Laos, Malaysia, Thailand, Indonesia, Philippines, Vietnam, New Guinea and Australia.

Ecology.

Grows in flood plains, riverbanks and semi-dry paddy fields; 70-676 m elev.

Phenology.

Flowering in August-September; fruiting in October-December.

Specimens examined.

Nepal, Kaski: Pokhara Valley, Sita Paila, 28°10'30.92"N, 83°59'40.36"E, 676 m elev., 11 Oct 2020, P. Bhandari & A. Bhandari 20101101 (KATH, TUCH) ; Jhapa: Kachankawal RM, Baniyani, 26°26'15.94"N, 88°3'1.28"E, 70 m elev., 04 Dec 2020, S. Chaudhary 20120406 (KATH) .