Fimbristylis nutans (Retz.) Vahl, Enum. Pl. 2: 285. 1805.

Bhandari, Prabin, Chaudhary, Satyam, Neupane, Ajay, Zhou, Shi-Liang & Zhang, Shu-Ren, 2021, Taxonomic notes on Cyperaceae of Nepal: new records of a genus, six species and other noteworthy species, PhytoKeys 180, pp. 141-156 : 141

Fimbristylis nutans (Retz.) Vahl, Enum. Pl. 2: 285. 1805.

Scirpus nutans Retz., Observ. Bot. 4: 12. 1786.

Type.

Malaysia, Malacca, J.G. König s.n. [lectotype, designated by Fischer 1932, pg. 69: LD (LD1283267 image!)] .

Description.

Perennial tufted herb. Leaves reduced to a tubular, bladeless sheath. Involucral bract glume-like, 3.5 mm long. Inflorescence consisting of a single terminal spikelet. Spikelet slightly nodding, ovoid with spirally arranged glumes. Glumes 2-4 × 1.5-3 mm, rust-brown, oblong-elliptic, margin membranous, apiculate. Style 3.5 mm long, flattened with ciliate margin. Stigmas 2. Stamens as long as style. Achene white, obovate, 1.5 × 1 mm, biconvex, with transverse wavy reticulation, basal stipe indistinct. (Fig. 2D ).

Distribution.

Nepal (new record), India, China, Myanmar, Malaysia, Indonesia, Thailand, Papua New Guinea, Sir Lanka, Vietnam and Australia.

Ecology.

Grows in marshy areas, edges of the lake; sometimes forming a floating island of vegetation, associated with Eleocharis species and Fimbristylis species; 700 m elev.

Phenology.

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

Specimen examined.

Nepal, Kaski: Pokhara Valley, Dipang Lake, 28°10'57.90"N, 84° 4'9.28"E, 700 m elev., 17 Sep 2019, P. Bhandari & V. Adhikari KAS13 (KATH).

Figures

Figure 2. Achene A Eleocharis ochrostachys B Fimbristylis acuminata C F. ferruginea D F. nutans E F. salbundia F F. thomsonii G Fuirena umbellata H Machaerina rubiginosa I Scleria rugosa.