Cyperus hermaphroditus |
Cyperus esculentus |
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yellow nut-grass |
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Habit | Herbaceous, sweet-scented perennial, the sharply triangular, solid stems 1-7 dm. tall, arising singly from slender rhizomes that terminate in small tubers. | |
Leaves | Leaves grass-like, clustered at the base, the elongate blade 3-8 mm. wide, the sheaths closed; involucre bracts elongate, unequal, sometimes longer than the leaves. |
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Flowers | Spikelets in open, cylindric spikes, the terminal spike or cluster of spikes sessile, the others single or in small groups on rays up to 7 cm. long; spikelets slender, 0.5-5 cm. long and 1-2 mm. wide; scales of the spikelets in two vertical rows, 2.5-3 mm. long, several nerved, broad and overlapping laterally, but not closely set; perianth none; stamens 3; style trifid. |
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Fruits | Achenes unequally triangular, 1.3-2 mm. long. |
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Cyperus hermaphroditus |
Cyperus esculentus |
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Flowering time | June-August | |
Habitat | Moist, low ground along streams and ditches, but sometimes in drier ground. | |
Distribution | Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
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Origin | Native | |
Conservation status | Not of concern | |
Sibling taxa | ||
Subordinate taxa | ||
Web links |
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