Cyperus flavescens

Cyperus flavescens L., Sp. Pl.: 46 (1753) (syn: Chlorocyperus flavescens (L.) Rikli; Distimus flavescens (L.) Raf.; Pycreus flavescens (L.) P.Beauv. ex Rchb.) as per WCSP;

Pycreus flavescens (L.) P.Beauv. ex Rchb., Fl. Germ. Excurs. 72 1830. (Syn: Chlorocyperus abyssinicus (Hochst. ex A.Rich.) Rikli; Chlorocyperus flavescens (L.) Rikli; Cyperus abyssinicus Hochst. ex A.Rich.; Cyperus durandii Boeckeler; Cyperus fallaciosus (Cherm.) Raymond; Cyperus flavens Pall.; Cyperus flavescens L. ………………….; Cyperus fontanesii Kunth; Cyperus gussonei Gasp. ex Guss.; Cyperus melanostachyus Walp. [Illegitimate]; Cyperus nieuwlandii Geise; Cyperus obtusiusculus Gand.; Cyperus pallidus Kit. ex Kanitz [Illegitimate]; Cyperus paraensis Mart. & Schrad. ex Nees; Cyperus piceus Liebm. ..; Cyperus poiformis Pursh; Cyperus polystachyus Jungh. [Illegitimate]; Cyperus setaceus Wulfen [Illegitimate]; Cyperus squalidus Liebm.; Cyperus stramineus Link; Cyperus tonduzianus Boeckeler; Cyperus tristachyus Boeckeler ..; Cyperus xanthinus C.Presl; Distimus flavescens (L.) Raf.; Pycreus fallaciosus Cherm.; Pycreus flavescens f. caucasicus (K.Koch) Soó …………; Pycreus intermedius Cherm.; Pycreus paraensis Nees; Pycreus piceus (Liebm.) C.B.Clarke; Pycreus potosiensis C.B.Clarke; Pycreus tristachyus (Boeckeler) C.B.Clarke) as per The Plant List Ver.1.1;

Annual, or possibly caespitose perennial, 5-60 cm. Stem 0.5-1.5 mm diam., trigonous, obtusely trigonous below, smooth. Leaves shorter than stem; sheaths reddish-brown or brown, mouth margin slightly concave; blades keeled or flat, grey-green, margins slightly involute, margins and midvein below scabrous, especially towards the acute apex. Inflorescence a globose cluster of spikes or a small anthelodium, primary branches up to 40 mm, cluster of spikes with c. 100 spikes, 15-30 mm diam.; bracts 2-3 foliose, up to 10(-20) cm; tubular prophyll brown. Spikes 5-15 x c. 2.5 mm, compressed, with up to 40 glumes; glume-like prophyll basally swollen; rachis quadrangular, almost straight, angles sharp, not winged, internodes c. 0.5 mm; glumes 2-2.5 mm, cymbiform, blunt mucronate, sides yellow-brown, margins scarious. Stamens 2. Nut 1-1.2 mm, globose or ellipsoid, stipitate, compressed, from yellow-brown to dark-brown, shiny, reticulate with areole twice as long as wide or more, lower ends of areole at same horizontal level, sometimes white protruding.

Flowering and fruiting: October-November

Wetlands

India and North temperate regions, widely distributed

(Attributions- Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi

from India Biodiversity Portal )