Cyperus Linnaeus (Q3241)
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Cyperus is a taxon with the rank genus within the tribe Cypereae
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English |
Cyperus Linnaeus
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Cyperus is a taxon with the rank genus within the tribe Cypereae
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Statements
taxon/id/Cyperus Linnaeus
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Cyperus Linnaeus
Cyperus
Linnaeus
FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
accepted
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Herbs, perennial or less often annual, cespitose or not, rhizomatous, stoloniferous, rarely tuberous.
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Culms solitary or not, trigonous or round, glabrous or scabridulous with extrorse or antrorse (rarely retrorse) prickles.
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Leaves usually basal;
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blades keeled abaxially, flat, V, or inversely W-shaped in cross-section.
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Inflorescences terminal, rarely pseudolateral, 1st order subumbellate to capitate, 2d order with spicate or digitately arranged spikelets, rarely a solitary spikelet;
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1st order rays unequal (rarely equal) in length, produced singly from the axils of inflorescence bracts;
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involucral-bracts 1–22, spirally arranged at culm apex, spreading to erect, leaflike.
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Spikelets: scales to 76, distichous, each subtending flower, cylindric to compressed, borne spicately or digitately at ends of rays (occasionally proliferous).
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Flowers bisexual [rarely unisexual], in axils of distichous floral scales, bases often decurrent onto rachilla as ± hyaline wings;
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styles linear, 2–3-fid, base deciduous or persistent;
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Achenes biconvex, flattened, or trigonous.
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