Cyperus hermaphroditus (Jacq.) Standl.  
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Family: Cyperaceae
Hermaphrodite Flat Sedge
[Cyperus alpinus Liebm., moreCyperus incompletus (Jacq.) Link, Cyperus sertularinus , Mariscus longiradiatus]
Cyperus hermaphroditus image
Sue Carnahan  
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Gordon C. Tucker*, Brian G. Marcks* & J. Richard Carter * in Flora of North America (vol. 23)
Herbs, perennial, rhizomatous. Culms trigonous, (10-)30-80(-140) cm × (0.4-)1-3(-5) mm, glabrous. Leaves V-shaped or flanged V-shaped, (5-)15-70(-90) cm × (2-)4-10(-13) mm, glabrous. Inflorescences: spikes 1(-5), rather densely ovoid or oblong-cylindric, (10-)25-45(-62) × 7-22 mm, 11-21 spikelets per 5 mm of rachis; rays (3-)5-10(-17), (1-)5-12(-24) cm; bracts (2-)4-8, ascending at 30-45°, V- or inversely W-shaped, (2-)8-40(-65) cm × (1-)2-8 mm; rachilla deciduous, wings 0.4-0.5 mm wide. Spikelets (10-)50-150, oblong to linear, quadrangular, (3-)4-8(-18) × (0.8-)1-1.2(-1.6) mm; distal spikelet spreading or ascending; floral scales (1-) 3-8, pale greenish white to golden brown, deep brown, or reddish brown, medially usually green, weakly to strongly 3(-4)-ribbed laterally, 1-3-ribbed medially, ovate to elliptic, (2-)2.6-3.2(-4) × 1.2-2 mm, apex obtuse. Flowers: anthers (0.4-)0.6-1 mm; styles 0.4-1.6 mm; stigmas 1-1.5 mm. Achenes brown or reddish brown, sessile or nearly so, ellipsoid, 1.4-1.8(-2) × 0.6-0.8(-1) mm, apex acute to obtuse, slightly apiculate, surfaces puncticulate. Fruiting summer-fall. Arroyos; 500-1200 m; Ariz., Tex.; Mexico; West Indies; South America. An erroneous report of Cyperus hermaphroditus from Alabama was based on misidentification of C. thyrsiflorus.

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Cyperus hermaphroditus
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Cyperus hermaphroditus image
Max Licher  
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Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
Sue Carnahan  
Cyperus hermaphroditus image
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