Carex sect. Firmiculmes
brown or red brown at base.
basal sheaths fibrous;
sheath fronts membranous;
blades V-shaped in cross section when young, glabrous.
1 spike;
bractless;
spike androgynous, with not more than 15 perigynia, lax.
ascending, veinless or weakly veined with 2 strong marginal veins, stipitate, narrowly obovate, trigonous in cross section, 4.7–8.4 mm, 2–3 times as long as wide, base tapering, with spongy tissue, apex rounded to beak, glabrous;
beak truncate.
trigonous, 4–5 mm, almost as large as bodies of perigynia;
style deciduous.
pistillate scales less than 10 mm, apex short- or long-awned.
3.
Carex sect. Firmiculmes
Species 3 (3 in the flora).
The relationships of Carex sect. Firmiculmes are unclear. The absence of bracts and presence of foliaceous pistillate scales are reminiscent of sect. Phyllostachyae Tuckerman ex Kükenthal. The groups differ in numerous other characters. The presence of rachillae suggests that the section is primitive; its phylogenetic position remains unresolved.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants cespitose, inconspicuously rhizomatous; culms terete, smooth distally; leaves involute, 0.8–1.5 mm wide, shorter than culms; perigynia with 2 strong marginal veins and several additional faint veins. | C. multicaulis |
1. Plants not cespitose, short to long rhizomatous; culms triangular, scabrous distally; leaves plane, 1.1–3.5 mm wide, equaling or exceeding culms; perigynia with 2 strong marginal veins, otherwise veinless. | → 2 |
2. Rhizomes prolonged; pistillate portions of spike unbranched; proximal pistillate scales chartaceous, cuspidate to short-awned. | C. geyeri |
2. Rhizomes very short; pistillate portions of spike 0–2 branched; proximal pistillate scales foliaceous, long-awned. | C. tompkinsii |
