Burke: Cyperus lanceolatus vs. Cyperus strigosus

	Cyperus lanceolatus	Cyperus strigosus
		false flatsedge, straw-colored flatsedge
Habit		Short-lived perennial without rhizomes, the sharply triangular, solitary or few solid stems 1-6 dm. tall.
Leaves		Leaves several, grass-like, crowded at the base, 2-10 mm. wide, the sheaths closed.
Flowers		Spikelets numerous, in short, cylindric spikes, spreading at right angles from the elongate rachis, 6-25 mm. long and 1-2 mm. wide; scales of the spikelets in two vertical rows, several nerved; axis of the spikelets with translucent wings that clasp the lower part of each achene; stamens 3; style trifid.
Fruits		Achenes unequally triangular, 1.5-2 mm. long, 3-4 times as long as wide.

	Cyperus lanceolatus	Cyperus strigosus
Flowering time		July-September
Habitat		Wet places, along the banks of large streams, in the valleys and lowlands.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring chiefly east of the Cascades crest and along the Columbia River in Washington; Washington to California, east across most of North America 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. squarrosus
Web links	Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Cyperus lanceolatus

Cyperus strigosus

false flatsedge, straw-colored flatsedge

Habit

Short-lived perennial without rhizomes, the sharply triangular, solitary or few solid stems 1-6 dm. tall.

Leaves

Leaves several, grass-like, crowded at the base, 2-10 mm. wide, the sheaths closed.

Flowers

Spikelets numerous, in short, cylindric spikes, spreading at right angles from the elongate rachis, 6-25 mm. long and 1-2 mm. wide;

scales of the spikelets in two vertical rows, several nerved;

axis of the spikelets with translucent wings that clasp the lower part of each achene;

stamens 3;

style trifid.

Fruits

Achenes unequally triangular, 1.5-2 mm. long, 3-4 times as long as wide.

Cyperus lanceolatus

Cyperus strigosus

Flowering time

July-September

Habitat

Wet places, along the banks of large streams, in the valleys and lowlands.

Distribution

[WildflowerSearch map]

[BONAP county map]

Occurring chiefly east of the Cascades crest and along the Columbia River in Washington; Washington to California, east across most of North America to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa