Cyperus dipsaceus Liebamann
Family: Cyperaceae
Wright's flatsedge,  more...
[Cyperus wrightii Britt.]
Cyperus dipsaceus image
Max Licher  
Herbs, perennial, rhizomatous. Culms trigonous, (30-)45-80 cm × (0.8-)1.2-2.2 mm, glabrous. Leaves flat to V-shaped, becoming trigonous apically, 15-30 cm × 0.5-3.2 mm. Inflorescences: spikes oblong-cylindric, densely spicate, ± truncate at base, (9-)12-22 × (4-)6-12 mm; rays 2-4(-5), (1.5-)2.5-6 cm; bracts 4-6, longest erect or nearly so, larger ones flat or V-shaped, smaller capillary, trigonous, 3-24 cm × 0.4-3.6 mm; rachilla ± deciduous, wings 0.2-0.4 mm wide. Spikelets (10-)20-60, oblong to linear-lanceoloid, compressed-quadrangular, 3-9 × 2-3.4 mm; floral scales deciduous, 2-4(-8), spreading, medially green, laterally stramineous, dull whitish or pale reddish brown, often red-dotted laterally, (3-)7-9-ribbed, ovate-lanceolate, (2-)2.2-2.8(-3) × (1-)1.2-1.8 mm, apex acute, weakly 3-dentate, mucro 0.2-0.6 mm, with apical tuft of crystalline prickles. Flowers: anthers 0.4-0.9 mm; styles 1-1.4 mm; stigmas 1-1.6 mm. Achenes brown, ± stipitate, broadly ellipsoid, 1.4-1.5(-1.6) × 0.8-0.9 mm, 0.1 × 0.1-0.2 mm, apex ± truncate, apiculate, surfaces papillose. Fruiting late summer. Seepage slopes in montane forests; 1000-1500 m; Ariz., N.Mex.; Mexico.
Tucker 1994, FNA 2002
Common Name: Wright's flatsedge Duration: Perennial Nativity: Native Lifeform: Graminoid General: Rhizomatous perennial with three sided stems 45-80 cm tall, 1-2 mm in diameter, rhizomes 0.5-3 cm long, tuberlike, 3-6 mm in diameter and covered in reddish brown scales. Vegetative: Leaves 2-3, 15-30 cm long, 0.5-3 mm wide, flat to v-shaped, becoming three edged near the apex, margins and keel rough to the touch throughout or smooth in the basal half. Inflorescence: With 4-6 subtending bracts, 3-24 cm long, 0.4-3.5 m wide, larger ones flat or v-shaped, smallest capillary, longest erect or nearly so, others ascendent; rays 2-4, 2.5-6 cm,spikes 12-22 mm long, 6-12 mm wide, densely oblong-cylindric, with rachis 10-16 mm long, spikelets 20-60, 3-9 mm long, 2-3.5 mm wide, oblong to linear-lanceolate, compressed-quadrate and borne at right angles, lower spikelets never reflexed, 2-4 deciduous scales, these 2-3 mm long, 1-2 mm wide, ovate-lanceolate with a mucro 0.2-0.6 mm long and apical tuft of crystalline prickles, dull whitish to pale reddish, to stramineous brown; achenes brown about 1.5 mm long, three sided, broadly ellipsoid with papillose surface. Ecology: Found in moist soils near seeps, springs, and along moist ledges and rich soils of canyons from 3,500-5,000 ft (1067-1524 m); flowers August-October. Notes: Distinguished by the combination of erect to ascendent inflorescence bracts, the densely oblong-cylindric spikes and acute, straw colored to light reddish brown scales. Ethnobotany: Unknown Etymology: Cyperus is from the Greek word meaning sedge, while dipsaceus is from Greek dipsa for thirst. Synonyms: Cyperus wrightii Editor: SBuckley, 2010
Cyperus dipsaceus image
Sue Carnahan  
Cyperus dipsaceus image
Sue Carnahan  
Cyperus dipsaceus image
Sue Carnahan  
Cyperus dipsaceus image
Liz Makings  
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image
Cyperus dipsaceus image