Fourangle Flatsedge (Cyperus hermaphroditus)
Description
Herbs, perennial, cespitose, rhizomatous. Culms trigonous, (20-) 30-80 cm - 1-2.5 mm, glabrous or occasionally with scattered prickles on distal angles. Leaves 9-11, flat to slightly V-shaped, 25-80 cm - 3.5-10 mm. Inflorescences: spikes (1-)3-6, loosely cylindric or oblong with parallel sides, 1.5-4 cm - 10-17 mm; rays 6-12, 2-25 cm, glabrous or rarely scabridulous proximal to spikes; bracts 6-11, ascending at 45-, flat, (1-)10-20(-26) cm - 1-10 mm; rachilla deciduous, wings persistent, 0.4-0.5 mm wide. Spikelets 10-60, narrowly ellipsoid, quadrangular, 5-8 - 1.5-2 mm; floral scales persistent, (2-)3-7, appressed, clear at maturity, laterally reddish to purplish brown, medially greenish, often erose at maturity, laterally 3-5-ribbed, medially 3-ribbed, ovate-elliptic, 2.5-3.2 - 1.8-2.1 mm, apex obtuse. Flowers: anthers 0.8-1 mm; styles 0.3-0.5 mm; stigmas 2-2.5 mm. Achenes brown to reddish brown, sessile, oblong-ovoid to broadly ellipsoid, slightly dorsiventrally flattened, 1.8-2 - 0.7-0.8 mm, apex obtuse, apiculate, surfaces papillose to puncticulate.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Liliopsida
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Order: Poales
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Family: Cyperaceae
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Genus: Cyperus
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