Difference between revisions of "Carex sect. Filifoliae"

(Tuckerman) Mackenzie

in N. L. Britton et al., N. Amer. Fl. 18: 177. 1935.

Basionym: Filifoliae Tuckerman Enum. Meth. Caric., 8. 1844
Treatment appears in FNA Volume 23.
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|section=Carex sect. Filifoliae

Latest revision as of 20:38, 5 November 2020

Plants cespitose, short-rhizomatous. Culms brown at base. Leaves: basal sheaths fibrous; sheath fronts membranous; blades filiform or V-shaped in cross section when young, glabrous. Inflorescences a single spike; bracts absent; spike androgynous. Proximal pistillate scales with apex obtuse or mucronate. Perigynia 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. Stigmas 3. Achenes trigonous, almost as large as bodies of perigynia; style deciduous.

Distribution

North America, Mexico.

Discussion

Species 5 (3 in the flora).

Selected References

None.

Key

1 Leaf blades folded to channeled, not quill-shaped, 1.5–2 mm wide near base; proximal pistillate scale usually conspicuously long-awned. Carex 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. Carex elynoides
2 Perigynium body short-pubescent, at least on distal 1/4; style base often conspicuously exserted from beak; rachilla present. Carex filifolia