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Arizona - New Mexico Chapter
Consortium of Midwest Herbaria
Intermountain Region Herbaria Network (IRHN)
Mid-Atlantic Herbaria
North American Network of Small Herbaria
Northern Great Plains Herbaria
Madrean Archipelago Biodiversity Assessment (MABA) - Flora
Red de Herbarios del Noroeste de México (northern Mexico)
SERNEC - Southeastern USA
Cyperus dentoniae
G. Tucker
Family:
Cyperaceae
Hairy Flat Sedge,
more...
hairy flatsedge
[
Cyperus flavomariscus var. peduncularis
,
more
Cyperus flavus var. peduncularis
(Britton) Kük.,
Mariscus pubescens
J.& K. Presl, non Cyperus pubescens Steud.
]
Sue Carnahan
FNA
Resources
Gordon C. Tucker*, Brian G. Marcks* & J. Richard Carter * in Flora of North America (vol. 23)
Herbs, perennial, cespitose, shortly rhizomatous. Culms 1-4, trigonous, (2-)20-50(-80) cm × (0.8-)1.5-2(-2.8) mm, basally glabrous or nearly so, apically hispidulous, on faces and angles distally, especially so immediately proximal to bracts. Leaves 2-5(-7), V-shaped, (5-)15-30(-45) cm × (1.5-)2.5-5(-8) mm. Inflorescences: spike 1 (occasionally 1-2 smaller sessile spikes at base), densely cylindric, (7-)11-20(-25) × (5-) 7-10(-12) mm; rays 3-6(-10), (1-)3-6(-18) cm, rays and rachis hispidulous; bracts 4-8(-10), ascending at 30-60°, V-shaped, (2-)10-25(-45) cm × (1-)3-6(-8) mm; rachilla deciduous, wings persistent, 0.3-0.4 mm wide. Spikelets (20-)70-120(-140), oblong-ellipsoid to oblong-lanceoloid, ± terete to quadrangular, (2.2-)3.4-4.5(-5.6) × (0.8-)0.9-1.2(-1.3) mm; distal spikelet spreading or ascending; floral scales 1(-3), appressed, stramineous, red-spotted, strongly 3(-4)-ribbed on either side of green part, medially weakly 3-ribbed, ovate to elliptic ovate, (2.4-)2.8-3.3(-3.6) × 1.6-2 mm, apex acute, mucronulate from excurrent midrib. Flowers: anthers (0.3-)0.4-0.6 mm; styles 0.4-0.6(-0.8) mm; stigmas 1-1.4 mm. Achenes brown, stipitate, ellipsoid, (1.6-)1.8-2 × (0.7-) 0.8-0.9 mm, stipe 0.1-0.2 × 0.2 mm, apex ± truncate, apiculate, surfaces puncticulate to glabrous.
Fruiting mid summer-fall (Jul-Sep). Various dry, open environments; 500-1000 m; Ariz.; Mexico; Central America; South America.
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Sue Carnahan
Sue Carnahan
Sue Carnahan
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Sue Carnahan
Stephen Hale
Sue Carnahan
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Sue Carnahan
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This project made possible by
National Science Foundation Award EF 1702516
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