Carex sect. Circinatae

Meinshausen

Trudy Imp. S.-Petersburgsk. Bot. Sada 18(3): 280. 1901.

Treatment appears in FNA Volume 23.

Plants cespitose or not, short or long-rhizomatous. Culms pale-brown at base. Leaves: basal sheaths not or scarcely fibrous; sheath fronts membranous; blades threadlike or V-shaped in cross-section, glabrous. Inflorescence 1 spike; bracts absent; spike androgynous or pistillate, lax. Proximal pistillate scales persistent, exceeding perigynia, apex cuspidate or awned. Perigynia not more than 15, erect, weakly veined, linear-lanceolate, obscurely trigonous, 3–6 mm, 3–4 times as long as wide, base tapering, margins rounded, apex tapering to beak, glabrous; beak less than 2 mm, orifice obliquely cleft. Stigmas (2–) 3. Achenes usually trigonous, 1.5–2.5 mm, smaller than bodies of perigynia; style deciduous.

Distribution

North America, amphi-Pacific

Discussion

Species 4 (2 in the flora).

Selected References

None.

Key

1 Plants cespitose, short-rhizomatous; leaves involute; distal margins of perigynia finely serrulate. Carex circinata
1 Plants not cespitose, long-rhizomatous; leaves flat; distal margins of perigynia smooth. Carex anthoxanthea
... more about "Carex sect. Circinatae"
trigonous +
smaller +
awned +  and cuspidate +
David F. Murray +
Meinshausen +
shortened +
tapering +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
v--shaped +  and thread-like +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
pale-brown +
round +  and trigonous +
North America +  and amphi-Pacific +
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 +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Trudy Imp. S.-Petersburgsk. Bot. Sada +
adventitious +
persistent +
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. Circinatae +
section +
plant +, not +  and cespitose +