Taxonomy
Family: Cyperaceae
Section Glareosae
Habitat
Sphagnum bogs, wet woods.
Associates
Distribution
Greenland to British Columbia, south to MD, WV, IL, and MN.
Morphology
In loose tufts on short, slender rhizomes; stems slender and weak, to 70 cm; leaves typically 1-3 mm wide; spikes 1-3, sessile, 1-4 cm apart in a slender, often flexuous culm, each with a few basal staminate flowers and typically 2-5 perigynia; bract of the lowest spike setaceous, 2-4 cm; scales ovate, acute, hyaline with a green midnerve, shorter than or about equaling the perigynia; perigynia thick, planoconvex, oval, 2.6-4 mm, with many fine nerves; beak slender, smooth, 0.5 mm; achene trigonous, oval-oblong, filling the perigynium; stigmas 3.
Notes
Fruiting June to August
Wetland indicator: OBL
Pretty easy to recognize from its long, wiry stems and rather sparse spikes. Plants with leaves less than 0.5 mm wide and with only 1 or 2 smaller perigynia are var. billingsii, found near the coast from Newfoundland to VT and PA.
References
Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of
Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.
© Michael Hough 2010 |