Purple Spikerush - Eleocharis atropurpurea
State Rank Reason (see State Rank above)
Reported for Montana in Dorn (1984).
Plants annual, cespitose. Culms erect or arcuate, terete, up to 15 cm tall. Leaf sheath oblique at apex and firm. Spikelet ovoid, up to 7 mm long, many-flowered; scales ovate, membranaceous with a green midrib and deep brown sides. Bristles several, translucent, slender, shorter than the achene or reduced; stamens 1-3; styles 2-branched, on a lenticular, obovoid achene, about 0.5 mm long, smooth, shining, lustrous black; tubercle conic and minute (Kolstad 1986, Flora of the Great Plains).
Erractic distribution in lower half of USA but evidently nowhere common (Kartesz 2009).
Sandy, moist areas, low prairies, margins of ponds (Kolstad 1986).
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.