26u. CAREX Linnaeus sect. LIMOSAE (Heuffel) Meinshauser, Trudy Imp. S.-Peterburgsk. Bot. Sada. 18: 283. 1901.
Peter W. Ball
Carex [unranked] Limosae Heuffel, Flora 27: 533. 1844
Plants loosely cespitose, short-rhizomatous; roots with dense yellow tomentum. Culms red- or purple-brown at base. Leaves: basal sheaths fibrous; sheath fronts membranous, spotted or streaked with red or pale brown; blades V-shaped in cross section when young, sometimes involute, glabrous. Inflorescences racemose, with 2–5 spikes; proximal bracts sheathless or sheath less than 4 cm; lateral spikes pistillate, androgynous, or gynecandrous, pedunculate, prophyllate; terminal spikes staminate, gynecandrous. Proximal pistillate scales with apex obtuse to acuminate or awned. Perigynia ascending, inflated, (3–)5–7-veined on abaxial face, veinless or 3–7-veined on adaxial face, stipitate or sessile, broadly elliptic or ovate, rounded-trigonous in cross section, base tapering or rounded, apex tapering or rounded to beak or beakless, minutely papillose; beak 0–0.5 mm, mouth entire or emarginate. Stigmas 3. Achenes trigonous, almost as large as bodies of perigynia; style deciduous or persistent portion protruding from perigynium mouth.
Species 6 (6 in the flora): cool temperate regions of the Northern Hemisphere and South America.
The species of Carex sect. Limosae can be readily recognized by the dense yellowish indumentum on the roots. If collected without the roots they can be confused with species of C. sect. Racemosae, sect. Scitae, and sect. Paniceae.
Moore, D. M. and A. O. Chater. 1971. Studies of bipolar disjunct species I. Carex. Bot. Not. 124: 317–334.