Cyperus spp.
Family: Cyperaceae
Cyperus image
Max Licher  
Herbs, perennial or less often annual, cespitose or not, rhizomatous, stoloniferous, rarely tuberous. Culms solitary or not, trigonous or round, glabrous or scabridulous with extrorse or antrorse (rarely retrorse) prickles. Leaves usually basal; ligules absent; blades keeled abaxially, flat, V-, or inversely W-shaped in cross section. Inflorescences terminal, rarely pseudolateral, 1st order subumbellate to capitate, 2d order with spicate or digitately arranged spikelets, rarely a solitary spikelet; spikelets 1-150; 1st order rays unequal (rarely equal) in length, produced singly from the axils of inflorescence bracts; involucral bracts 1-22, spirally arranged at culm apex, spreading to erect, leaflike. Spikelets: scales to 76, distichous, each subtending flower, cylindric to compressed, borne spicately or digitately at ends of rays (occasionally proliferous). Flowers bisexual [rarely unisexual], in axils of distichous floral scales, bases often decurrent onto rachilla as ± hyaline wings; perianth absent; stamens 1-3; styles linear, 2-3-fid, base deciduous or persistent; stigmas 2-3. Achenes biconvex, flattened, or trigonous.
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Image of Cyperus alopecuroides
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Image of Cyperus bushii
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Image of Cyperus camphoratus
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Image of Cyperus castaneus
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Image of Cyperus cylindricus
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Image of Cyperus deeringianus
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Image of Cyperus densicaespitosus
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Image of Cyperus dissitiflorus
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Image of Cyperus distans
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Image of Cyperus erythrorrhizos
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Image of Cyperus floridanus
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Image of Cyperus glaber
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Image of Cyperus grayii
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Image of Cyperus louisianensis
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Image of Cyperus lundellii
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Image of Cyperus matudae
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Image of Cyperus metzii
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Image of Cyperus nuttallii
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Image of Cyperus onerosus
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Image of Cyperus pennellii
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Image of Cyperus pohlii
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Image of Cyperus pumilus
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Image of Cyperus pycnostachyus
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Image of Cyperus schaffneri
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Image of Cyperus schimperianus
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Image of Cyperus serrulatus
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Image of Cyperus swartzii
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Image of Cyperus torreyi
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Image of Cyperus uncinulatus
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Image of Cyperus winkleri
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Image of Kyllinga nemoralis
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Image of Pycreus flavescens
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Image of Pycreus niger
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