Carex filifolia var. filifolia
Carex sect. Filifoliae
thread-leaf sedge
round to sharply trigonous, 8–35 cm.
brown at base.
blades 7–25 cm, 0.3–0.7 mm wide near base.
basal sheaths fibrous;
sheath fronts membranous;
blades filiform or V-shaped in cross section when young, glabrous.
a single spike;
bracts absent;
spike androgynous.
(10–)12–26(–30) × 3–7 mm, staminate portion 4–14 mm.
obovate, (2.8–)3–4.8 × 1.4–2 mm;
beak 0.2–0.8 mm.
erect or ascending, veinless, or with 2 prominent marginal veins, obovate, ovate, or elliptic, rounded trigonous in cross section, base ± tapering or rounded, apex rounded or truncate, to abrupt beak or not, puberulent distally;
beak 0.2–1 mm, orifice truncate.
2.2–3(–3.3) × 1.3–1.9 mm.
trigonous, almost as large as bodies of perigynia;
style deciduous.
pistillate scales 2.9–4.5(–6.5) × 1.9–4 mm excluding awns, usually equaling or longer than perigynia.
pistillate scales with apex obtuse or mucronate.
3.
Carex filifolia var. filifolia
Carex sect. Filifoliae
Species 5 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaf blades folded to channeled, not quill-shaped, 1.5–2 mm wide near base; proximal pistillate scale usually conspicuously long-awned. | C. oreocharis |
1. Leaf blades involute-cylindric, quill-shaped, 0.2–0.8 mm wide near base; proximal pistillate scale obtuse to short-awned. | → 2 |
2. Perigynium body glabrous or at most very sparsely short-hirsute near beak; style base not conspicuously exserted from beak, rachilla absent. | C. elynoides |
2. Perigynium body short-pubescent, at least on distal 1/4; style base often conspicuously exserted from beak; rachilla present. | C. filifolia |
BC
CA
OR
WA
Flora NW
KS Wildflowers
MN Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
