UW Burke Herbarium species comparison

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Cyperus reflexus

Cyperus lupulinus

Great Plains flatsedge
Habit Herbaceous, tufted perennial from a crown, with knotted rhizomes, the culms triangular, glabrous, 10-50 cm. tall and 0.4-1.2 mm. broad.
Leaves

Leaves flat, 5-40 cm. long and 1-3.5 mm. broad;

sheaths closed.
Flowers

Inflorescence an ovoid to globose cluster of spikes, 1.2-3.5 cm. in diameter, the rays of the spikes 1-4, 1-6 cm. long;

spikelets 15-60, compressed, oblong-lanceolate, 6-22 mm. by 2.5-4 mm.;

scales 5-22, off-white to light reddish-brown, ovate-elliptic, 2.5-4 by 2-2.6 mm.;

perianth none;

stigmas 3;

styles trifid.
Fruits

Achenes dark brown to black, sessile, ellipsoid, about 2 mm. long and 1 mm. wide.

Cyperus reflexus

Cyperus lupulinus
Flowering time June-August
Habitat Cobble riverbanks and rocky canyon slopes.
Distribution
[BONAP county map]
Occurring east of the Cascades crest in southeastern Washington; disjunct in southeastern Washington and adjacent Oregon and Idaho, otherwise from U.S. Great Plains to eastern Canada and Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Review Group 1 in Washington (WANHP)
Sibling taxa
C. acuminatus, C. bipartitus, C. diandrus, C. eragrostis, C. erythrorhizos, C. esculentus, C. fuscus, C. lupulinus, C. lupulinus × C. schweinitzii, C. schweinitzii, C. squarrosus, C. strigosus
C. acuminatus, C. bipartitus, C. diandrus, C. eragrostis, C. erythrorhizos, C. esculentus, C. fuscus, C. lupulinus × C. schweinitzii, C. schweinitzii, C. squarrosus, C. strigosus
Subordinate taxa
C. lupulinus ssp. lupulinus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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