FLAT-STEM SPIKE-RUSH
File Size: 65 KB
 
Eleocharis compressa  Sulliv.
Konza Prairie, Riley County, Kansas
Perennial
Height: 4 to 12 inches
Family: Cyperaceae - Sedge Family
Flowering Period:   June, July, August
Also Called: Flat-stem spike-sedge, compressed spikerush.
Culms: Erect, slender, 4 to 12 inches tall, with fine ridges (striate). The stem is flattened or "compressed" below the spikelet, i.e. it is conspicuously two-sided.
Leaves: Bladeless sheaths at the base.
Inflorescences: Spikelets, solitary, terminal.
Spikelets: Oblong or ovoid, up to .5 inch long, thicker than culm, many-flowered; scales ovate-lanceolate, golden-brown to reddish-brown with light to whitish margins; tip of scale long-pointed, whitish, often 2-cleft.
Habitat: Low wet areas, marshes, sandy flood plains, woodland openings, and limestone glades; wet soils.
Distribution: Throughout except southwest corner of Kansas.
Comments: Flat-stem spike-rush grows in mats.
 Long-stem spike-rush (Eleocharis palustris) occurs in similar habitats but can grow to 4 feet tall.

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Konza Prairie, Riley County, Kansas
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Konza Prairie, Riley County, Kansas