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Cyperus xmesochorus  Geise
Tallgrass Prairie National Preserve, Chase County, Kansas
Height: Up to 30 inches
Family: Cyperaceae - Sedge Family
Flowering Period:   July, August, September,October
Culms: Erect, glabrous or rarely slightly rough.
Leaves: Blades occasionally reaching inflorescences, up to 1/4 inch wide, glabrous.
Inflorescences: Spikes, central 1-3 sessile, lateral 2-10 spreading or slightly ascending on unequal rays to 3.5 inches long, condensed, hemispheric or ellipsoid.
Flowers: Spiklets 5-15, ascending, flattened, 1/2 to 1 inch long, to 18-flowered, radiating from common point; scales ovate, 9-15-nerved; margins rough; tips abruptly short-pointed.
Fruits: Achenes, ellipsoid, 3-angled, less than 1/8 inch long, pale brown, 1-seeded.
Comments: Rhizomatous. Cyperus xmesochorus is a hybrid between Cyperus lupulinus (Spreng.) Marcks and Cyperus schweinitzii Torr. It is common and widespread.

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Tallgrass Prairie National Preserve, Chase County, Kansas
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