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Cyperus haspan L., Sp. Pl. 45 1753. (Syn: Cyperus adenophorus Schrad. ex Nees .; Cyperus americanus (Boeckeler) Palla [Illegitimate]; Cyperus aphyllus Vahl; Cyperus autumnalis Vahl; Cyperus caespitosus Llanos [Illegitimate]; Cyperus cancellatus Ridl.; Cyperus cayennensis Link; Cyperus efoliatus Boeckeler; Cyperus gracilis Muhl. [Illegitimate]; Cyperus gramineus Roem. & Schult.; Cyperus graminifolius Poir.; Cyperus haspan var. adenophorus (Schrad. ex Nees) Kük. …………………….; Cyperus hyemalis Pursh ex C.B.Clarke; Cyperus junceus Link; Cyperus juncoides Lam.; Cyperus laticulmis Spreng.; Cyperus leptos Schult.; Cyperus microcarpus Boeckeler; Cyperus muehlenbergii Spreng.; Cyperus nudus Kunth ..; Cyperus pedatus Nees; Cyperus planiculmis Steud.; Cyperus platyculmis R.Br.; Cyperus riparius Schrad. ex Nees [Illegitimate]; Cyperus stellatus Link [Illegitimate]; Cyperus triqueter Boeckeler; Cyperus tunicatus Roem. & Schult.; Cyperus vaginatus Link [Illegitimate]; Scirpus autumnalis Rottb. [Illegitimate]);
Erect, spaced, rhizomatous perennials; rhizome long, creeping; roots red-purple; culms 15-35 cm tall, triquetrous. Leaves few, basal, 2-10 x 0.2-0.5 cm, linear, apex acute, sometimes reduced to lanceolate appendage of sheaths; sheaths upto 5 cm long, reddish brown. Inflorescence compound, many-rayed, 4-9 cm across, ultimate branches ending in digitately arranged clusters of spikelets; leafy bracts 2-3, the longest upto 6 cm long. Spikelets 5-10 x 1-2 mm, linear-lanceolate, compressed. Glumes 1.5-2 x 0.5-1 mm, oblong-ovate, mucronulate, keeled. Stamens 2-3; connective bristly at top. Stigmas 3. Nut c. 0.5 x 0.5 mm, obovoid, trigonous, broadly stipitate, cream-yellow, verruculose. Flowering and fruiting: Throughout the year
Along banks of streams, paddy fields and marshy areas
Pantropical
The difference between C. haspan L. and C. tenuispica can be found in – http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=109010#KEY-1-26, or visually – http://www.efloras.org/object_page.aspx?object_id=121987&flora_id=2.
Also to be noted the epithet “halpan” in FoP –
Relevant urls –
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