Carex sect. Macrocephalae

Kükenthal in H. G. A. Engler

in H. G. A. Engler, Pflanzenr. 20[IV,38]: 186. 1909.

Treatment appears in FNA Volume 23.

Plants usually not cespitose, rhizomatous. Culms brown at base. Leaves: basal sheaths fibrous; sheath fronts membranous; blades V-shaped in cross-section when young, widest leaves 4–8 mm wide, glabrous. Inflorescences paniculate, with 20+ spikes, ovoid or oblong capitate, occasionally with proximal 1–2 spikes separated, sessile; proximal bracts leaflike or threadlike, sheathless; spikes staminate, pistillate, or androgynous, sessile, without prophylls. Proximal pistillate scales with apex awned. Perigynia ascending or at length spreading, veined on both faces, short-stipitate, narrowly ovate, thickly planoconvex in cross-section, base tapering or rounded, with spongy tissue, margins serrulate-winged, apex tapering to beak, glabrous; beak with abaxial suture, margins entire, apex bidentate. Stigmas 3. Achenes rounded-trigonous, smaller than bodies of perigynia; style deciduous.

Distribution

North America, e Asia

Discussion

Species 2 (2 in the flora).

Selected References

None.

Key

1 Culms bluntly angled, smooth or, sometimes, weakly serrulate on 1 angle immediately proximal to inflorescences; proximal spikes appressed to ascending; proximal pistillate scales with awn to 6–12 mm; anthers 4–6.5 mm. Carex kobomugi
1 Culms sharply angled, at least 1 angle serrulate immediately proximal to inflorescences; proximal spikes ascending-spreading to spreading; proximal pistillate scales with awn to 1.2–4 mm; anthers 2.5–5 mm. Carex macrocephala

"shortened" is not a number.

... more about "Carex sect. Macrocephalae"
rounded-trigonous +
smaller +
bidentate;tapering +
Joy Mastrogiuseppe +
Kükenthal in H. G. A. Engler +
rounded +  and tapering +
v--shaped +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
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 e Asia +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
oblong +  and ovoid +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
serrulate-winged +
with (1-)3-6(-30) bristles and/or scales +
short-stipitate +  and veined +
at length spreading +  and ascending +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
thread-like;leaflike +
in H. G. A. Engler, Pflanzenr. +
adventitious +
basal +  and proximal +
2-keeled +
cylindric +
sessile +, pistillate +  and staminate +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Macrocephalae +
section +
plant +  and cespitose +
4mm +  and 8mm +