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Image of Schoenoplectiella supina (L.) Lye
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Schoenoplectiella supina (L.) Lye

Comprehensive Description

provided by North American Flora
Scirpus supinus L. var. Hallii A. Gray, Man. ed. 5, 563. 1867.
Scirpus Hallii A. Gray, Man. ed. 3, xcvii. 1862.
Scirpus saximontanus Fernald, Rhodora 3: 251. 1901.
Scirpus uninodis var. Hallii Beetle, Am. Jour. Bot. 29: 656. 1942.
Fibrous-rooted annual; culms 1-3.5 dm. high, erect, green, terete or obscurely angled,
sheathed at the base, the sheaths prominently mucronate-tipped, or the upper often bearing
blades 3-12 cm. long; outer involucral bract 3-12 cm. long, erect or incurved; second involucral
bract below the spikelets, to 3 cm. long; spikelets 2-many, both sessile and rayed, 3-15 mm.
long, ovate to cylindric-acute, green drying to pale straw-brown; scales hyaline-margined,
fimbriate, 3-3.5 mm. long, 3 mm. broad, the green midrib excurrent; bristles present or absent;
stigma bifid or trifid; achene 1.5-2 mm. long, 1 mm. broad, dark gray-brown, prominently
horizontally ridged, trigonous, apiculate.
Type locality: St. Louis, Missouri.
Distribution: Rare and scattered on wet shores and stream banks and in moist swales; Massachusetts; Georgia and Florida; Ohio to South Dakota, south to Mexico.
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bibliographic citation
Alan Ackerman Beetle. 1947. (POALES); (CYPERACEAE); SCIRPEAE (PARS). North American flora. vol 18(8) New York Botanical Garden, New York, NY
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