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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 elegans
L.
Family:
Cyperaceae
Royal Flat Sedge
[
Cyperus trachynotus
,
more
Scirpus potosiensis
]
Max Licher
FNA
Resources
Gordon C. Tucker*, Brian G. Marcks* & J. Richard Carter * in Flora of North America (vol. 23)
Herbs, perennial, cespitose, shortly rhizomatous, coarse, viscous. Culms round to roundly trigonous, 15-80 cm × 2-4 mm, glabrous. Leaves: adaxial face concave, becoming trigonous apically, 15-75 cm × 1-4 mm, margins involute. Inflorescences: spikes ovoid, 10-20 mm wide; rays 3-8(-10), 0.5-12 cm; 2d order rays 0-3, 1-3 cm; bracts 3-7, horizontal to vertical, 2.5-5.5 cm × 1-4 mm, margins involute; 2d order bracts 0-3, 1-3 cm; rachilla persistent, wingless. Spikelets 3-20(-30), beige to greenish or reddish brown, strongly compressed, oblong-ellipsoid to oblong-lanceoloid, 3-15 × 2.5-3.5 mm; floral scales deciduous, 6-22, laterally pale greenish white to stramineous or reddish brown, medially pale green to yellowish green, laterally 2-ribbed, medially 3-5-ribbed, broadly ovate, (2-)2.8-3.6 × 2.4-2.6 mm, apex with slightly excurved mucro 0.2-0.3 mm, apically scabrid. Flowers: anthers 0.6-1.4 mm; styles 1.2-1.5 mm; stigmas 1-1.5(-3) mm. Achenes dark reddish brown to black, stipitate, obovoid, faces concave, flat or subtly convex, (1.4-)1.8-2 × 0.9-1 mm, base cuneate, stipe (sometimes absent) spongy, 0.1-0.2 × 0.2-0.4 mm, apex truncate, apiculate, surfaces coarsely papillose.
Fruiting summer. Ditches, damp pastures, pond shores, riverbanks; 0-500 m; Fla., La., N.Mex., Tex.; Mexico; Central America; South America.
Open Interactive Map
Max Licher
Max Licher
Max Licher
Liz Makings
Sue Carnahan
Liz Makings
Sue Carnahan
Sue Carnahan
Sue Carnahan
Sue Carnahan
Sue Carnahan
Sue Carnahan
Sue Carnahan
Liz Makings
Liz Makings
University of Florida Herbarium
Madison Marzullo
University of Florida Herbarium
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This project made possible by
National Science Foundation Award EF 1702516
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