Carex sect. Leucoglochin

Dumortier

Fl. Belg., 146. 1827.

Synonyms: Carex sect. Orthocerates Koch
Treatment appears in FNA Volume 23.

Plants cespitose or not, short to long rhizomatous. Culms pale-brown at base. Leaves: basal sheaths not fibrous; sheath fronts membranous; blades V-shaped in cross-section when young, glabrous. Inflorescence 1 spike per culm; bracts absent; spike androgynous. Proximal pistillate scales soon deciduous, less than 10 mm, shorter than perigynium, apex obtuse or subacute. Perigynia at first erect, becoming deflexed, obscurely veined, very obliquely substipitate, lance-subulate to narrowly elongate-oblong, almost round in cross-section, base tapered and spongy, apex tapering gradually to beak, glabrous; beak less than 2 mm, orifice truncate. Stigmas 3. Achenes narrowly oblong or narrowly oblong-lanceoloid, trigonous with sides concave proximally, much smaller than bodies of perigynia; style persistent.

Distribution

Widespread in arctic, boreal, and alpine regions of North America and Eurasia, w and s South America, c Asia

Discussion

Species 5 or 6 (2 in the flora).

Members of Carex sect. Leucoglochin are further characterized by pistillate scales that fall very early.

Selected References

None.

Key

1 Perigynia 3.4–4.7 mm (excluding rachilla); rachilla exserted 0.5–2.8 mm from orifice of beak, exceeding style, style not exserted; pistillate scales (except the proximal) 2.4–3 mm; proximal leaves blade-bearing. Carex microglochin
1 Perigynia (5–)5.9–7.8 mm; rachilla vestigial, style exserted; pistillate scales 3.7–5.9 mm; proximal leaves bladeless. Carex pauciflora

"shortened" is not a number.

... more about "Carex sect. Leucoglochin"
trigonous;oblong-lanceoloid;oblong +
much smaller +
tapering;subacute;obtuse +
Theodore S. Cochrane +
Dumortier +
tapered +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
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 +
pale-brown +
round +  and trigonous +
Widespread in arctic +, boreal +, and alpine regions of North America and Eurasia +, w and s South America +  and c Asia +
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 +
substipitate +  and veined +
deflexed +  and erect +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
deciduous +
basal +  and proximal +
2-keeled +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cylindric +
concave +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
persistent +
2-3(-4)-fid +
Carex sect. Orthocerates +
Carex sect. Leucoglochin +
section +
plant +, not +  and cespitose +