Carex sect. Filifoliae

(Tuckerman) Mackenzie in N. L. Britton et al.

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.

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
... more about "Carex sect. Filifoliae"
trigonous +
Joy Mastrogiuseppe +
(Tuckerman) Mackenzie in N. L. Britton et al. +
shortened +
rounded +  and tapering +
Filifoliae +
puberulent +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
v--shaped +  and filiform +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
North America +  and Mexico +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
ascending +  and erect +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
in N. L. Britton et al., N. Amer. Fl. +
adventitious +
basal +  and proximal +
2-keeled +
cylindric +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Filifoliae +
section +
plant +  and cespitose +