Carex sect. Chlorostachyae

Tuckerman ex Meinshausen

Trudy Imp. S.-Peterburgsk. Bot. Sada 18: 283. 1901.

Synonyms: Carex sect. Capillares (Ascherson & Graebner) Rouy
Treatment appears in FNA Volume 23.

Plants cespitose, short-rhizomatous. Culms brown at base. Leaves: basal sheaths ± fibrous; sheath fronts membranous; blades V-shaped in cross-section when young, or filiform or channeled, widest leaves 1–4 mm, glabrous. Inflorescences racemose, with 3–6 spikes; proximal nonbasal bracts leaflike, often short, long-sheathing, sheath more than 4 mm, longer than diameter of stem; lateral spikes pistillate, spreading or pendent, pedunculate, peduncles longer than spikes (spikes erect or on short peduncles in artic and high mountain plants), prophyllate; terminal spike staminate, gynecandrous, or androgynous. Proximal pistillate scales with apex obtuse to acute. Perigynia ascending, not speckled redbrown, veinless except for 2, strong, marginal veins or weakly 2–10-veined, stipitate, lanceolate to narrowly ovate, obtusely trigonous in cross-section, base rounded, apex contracted or tapering to beak, glabrous; beak 0.3–1 mm, margins entire or serrulate, orifice entire or subentire. Stigmas 3. Achenes trigonous, almost as large as perigynia, glabrous; style deciduous.

Distribution

Cool temperate, alpine, and arctic regions of the Northern Hemisphere

Discussion

Species ca. 8 (3 in the flora).

Selected References

None.

Key

1 Leaf blades not more than 1 mm wide, channeled; perigynia distinctly veined on faces; terminal spike androgynous or staminate. Carex williamsii
1 Leaf blades (0.75–)1–4 mm wide, flat or, rarely, folded; perygynia with marginal veins, otherwise veinless on faces; terminal spike staminate or gynecandrous. > 2
2 Terminal spike usually staminate; lateral spikes 2–4. Carex capillaris
2 Terminal spike usually gynecandrous; lateral spikes usually 4–10. Carex krausei
trigonous +
Peter W. Ball +
Tuckerman ex Meinshausen +
shortened +
rounded +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
stipitate +  and 2-10-veined +
trigonous +, lanceolate +  and narrowly ovate +
round +  and trigonous +
Cool temperate +, alpine +  and and arctic regions of the Northern Hemisphere +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
pedunculate +  and pistillate +
pendent +  and spreading +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
serrulate +  and entire +
subentire +  and entire +
with (1-)3-6(-30) bristles and/or scales +
not speckled redbrown +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
long-sheathing +  and leaflike +
Trudy Imp. S.-Peterburgsk. Bot. Sada +
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. Capillares +
Carex sect. Chlorostachyae +
section +
androgynous +  and gynecandrous +
plant +  and cespitose +