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(Last Modified On 10/23/2012)
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(Last Modified On 10/23/2012)
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Species
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CYPERUS ROTUNDUS L.
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PlaceOfPublication
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Sp. Pl. 45. 1753
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Description
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Perennial, the rhizomes sometimes tuber-bearing; culms slender, 10-60 cm. high, bulbous-thickened at the base; leaves 2-6 mm. wide; bracts usually short; spikes ovate, lax, on rays to 6 cm. long; spikelets linear, 1-2 cm. long, 12- to 30- flowered, rachilla winged; scales purplish, carinate, obtuse, obscurely nerved; achene obovate-ellipsoid, bluntly trigonous, 1.5 mm. long, black, minutely papillose, maturing only infrequently.
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Distribution
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Waste places in all tropical and subtropical regions of both hemispheres.
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Specimen
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CANAL ZONE: Balboa Heights, Killip 4235; Culebra, Pittier 6683; Frijoles, Pittier 6839; Ancon, Pittier 3956; Colon, Rose 23995; Barro Colorado Island, Kenoyer 152; Gatu'n, Standley 27327; and many other collections. PANAMA: Panama City, Pittier 6715.
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