Eleocharis engelmannii |
Eleocharis uniglumis |
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Engelman spikerush |
slender spike-rush |
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Habit | Tufted annual, 0.5-5 dm. tall, the culms 0.5-2 mm. thick, with many ribs. | |
Leaves | Leaves all basal and reduced to sheaths. |
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Flowers | Spikelet terminal and solitary, 5-13 mm. long, ovoid, many-flowered, usually over 40; scales spirally arranged, 1.7-2.5 mm. long, purplish or brownish, with greenish mid-strip and paler, translucent margins, the lowest one sometimes empty; perianth bristles 6-7, brownish, about equal to the achene, or wanting; stamens 3; style usually bifid, thickened at the base. |
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Fruits | Achenes lenticular, 1.0-1.5 mm. long, including the flattened tubercle, which is appressed to the summit of the brown, smooth and shining body of the achene. |
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Eleocharis engelmannii |
Eleocharis uniglumis |
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Flowering time | June-September | June-August |
Habitat | Marshes and other wet places, from sea level to moderate elevations in the mountains. | Shores, dunes, alkaline marshes, and peatlands. |
Distribution | Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
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Occurring east of the Cascades crest in Washington, where known only from a historic collection (1935); British Columbia to Washington, also Nevada, scattered east across North America to the Atlantic Coast; circumboreal.
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Origin | Native | Native |
Conservation status | Not of concern | Review Group 1 in Washington (WANHP) |
Sibling taxa | ||
Web links |
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