Cyperus diffusus Vahl, Enum. Pl. Obs. 2: 321 (1805) (syn: Cyperus bancanus var. brevibracteatus E.G.Camus ; Cyperus buettneri Boeckeler ; Cyperus calacaryensis Steud. ; Cyperus diffusus var. brevibracteatus (E.G.Camus) Kük. ; Cyperus diffusus f. celebicus (Miq.) Kük. ; Cyperus diffusus var. macrostachyus Boeckeler ; Cyperus diffusus subsp. macrostachyus (Boeckeler) T.Koyama ; Cyperus diffusus var. multispicatus S.M.Huang ; Cyperus diffusus var. pubisquama (Steud.) Kük. ; Cyperus holophyllus Miq. ex de Vriese ; Cyperus holophyllus var. celebicus Miq. ; Cyperus iridifolius A.Dietr. ; Cyperus lagorensis Steud. ; Cyperus laxus var. macrostachyus (Boeckeler) Karth. ; Cyperus laxus subsp. macrostachyus (Boeckeler) V.P.Prasad & N.P.Singh ; Cyperus laxus var. multispicatus (S.M.Huang) S.M.Huang ; Cyperus moestus Kunth ; Cyperus nigroviridis Thwaites ; Cyperus parciflorus Link ; Cyperus pubisquama Steud. ; Cyperus sarzogonensis J.Presl & C.Presl ; Cyperus scirpoides J.Presl & C.Presl; Eucyperus diffusus (Vahl) Rikli  );
Tropical & Subtropical Asia to Queensland: Andaman Is., Assam, Bangladesh, Bismarck Archipelago, Borneo, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, India, Jawa, Laos, Malaya, Maluku, Myanmar, Nepal, New Guinea, Nicobar Is., Queensland, Solomon Is., Sri Lanka, Sulawesi, Sumatera, Taiwan, Thailand, Tibet, Vietnam as per POWO;

Erect, single or tufted, perennials; rhizome short, corm-like, covered with brown scales; culms 45-100 cm tall, trigonous, triquetrous below the inflorescence. Leaves several, basal, 37-95 x 1-2 cm, linear, abruptly acute at apex, flattish margins scabrous, prominently 3-nerved; sheaths upto 10 cm long, purple-brown. Inflorescence compound to decompound, 20-35 cm across, diffuse; primary rays many; leafy bracts 5-9, the longest upto 73 cm long and 2 cm wide. Spikelets sessile, 8-12 x 1.5-2 mm, linear-oblong, flattened, acute, 25-30-flowered. Glumes c. 1.5 x 1 mm, ovate-obtuse, closely imbricating, strongly keeled, keel excurrent into a mucro, margins white-hyaline. Stamens 2-3. Stigmas 3. Nut c. 1.5 x 0.5 mm, ellipsoid, triquetrous, apiculate, dark brown to black.
Flowering and fruiting: December-August
Marshy areas of evergreen forests
(Attributions: Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi as per India Biodiversity Portal)

SK 3682 28 January 2023 – Grass: 7 very high res. images.

Location: Jalthal, Jhapa, East Nepal
Date: 02 January 2023
Elevation: 67 m.
Habitat: Wild
Cyperus ? Which one ?

Yes, it appears so. But could not find any match as per comparative images at
What are the species listed in your area?

Suggested to be Cyperus diffusus Vahl !

Who has suggested it?

Prabin Bhandari, working researcher on Cyperus.


POWO  Catalogue of Life  GBIF (High resolution specimens) Flora of China  FOC illustration  Annotated checklist of Flowering plants of Nepal  India Biodiversity Portal  Wikipedia  Useful Tropical Plants

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