UW Burke Herbarium species comparison

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Cyperus haspan

Cyperus squarrosus

awned flatsedge
Habit Tufted, sweet-scented annual, the triangular, solid, slender stems 0.3-1.5 dm. tall.
Leaves

Leaves few, grass-like, all near the base, as long or longer than the culms, 0.5-2 mm. wide;

involucral bracts much surpassing the inflorescence.
Flowers

Spikelets in dense, capitate clusters, the terminal cluster sessile, the others on slender rays up to 3 cm. long;

spikelets 4-10 mm. long, flattened;

scales of the spikelets in two vertical rows, 7- to 9-nerved, 1.0-1.7 mm. long, with a recurved awn tip 0.3-1.0 mm. long;

stamen solitary;

style trifid.
Fruits

Achenes triangular, 0.6-1.0 mm. long.

Cyperus haspan

Cyperus squarrosus
Flowering time June-September
Habitat Lake and pond shores, banks of slow moving streams and rivers, and other wet, open areas at low to middle elevations.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
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. lupulinus × C. schweinitzii, C. schweinitzii, C. strigosus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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