Carex sect. Squarrosae

J. Carey

Carices North. U.S., 564. 1847.

Treatment appears in FNA Volume 23.
Revision as of 01:17, 30 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Plants cespitose or colonial, short to long rhizomatous. Culms brown or redbrown at base. Leaves: basal sheaths not fibrous; sheath fronts membranous; blades septate-nodulose, usually V-shaped in cross-section when young, usually glabrous. Inflorescences single spike or racemose, with 2–9 spikes; proximal bracts leaflike or threadlike, sheathless or sheath longer than diameter of stem, at least 3 times as long as inflorescence; lateral spikes pistillate or infrequently gynecandrous, larger spikes usually with more than 50 perigynia, pedunculate, prophyllate; terminal spike staminate or gyncecandrous. Proximal pistillate scales sometimes with narrow, indistinct body, apex obtuse to awned. Perigynia ascending to spreading, many-veined, sessile or shortly stipitate, inflated, obconic, round in cross-section, not more than 10 mm, base tapering or rounded-tapering, apex truncate, abruptly beaked, glabrous; beak 1.2–3.8, bidentate, teeth 0.3 mm or longer. Stigmas 3. Achenes trigonous, 1.2–3 mm, smaller than bodies of perigynia; style persistent or deciduous.

Distribution

Temperate regions of e and mid w North America and temperate South America

Discussion

Species 4 (4 in the flora).

Selected References

None.

Key

1 Terminal spike largely staminate; pistillate scales with long awns, exceeding perigynia bodies; achenes 1.2–2.1 mm. > 2
1 Terminal spike gynecandrous; pistillate scales with short awns or awnless, completely hidden by perigynia; achenes 2–3 mm. > 3
2 Pistillate scales with narrow, indistinct body, 0.1–0.4 mm wide; staminate scales linear, 0.3–0.8 mm wide, loosely, irregularly imbricated with tips spreading; plants cespitose, not colonial, short-rhizomatous. Carex frankii
2 Pistillate scales with wider, translucent body, 0.4–0.9(–1.1) mm wide; staminate scales lanceolate, narrowly ovate, or oblong-obovate, 0.9–1.6 mm wide, ± tightly imbricate in spike; plants not cespitose, colonial, long-rhizomatous. Carex aureolensis
3 Style persistent, sinuous; achenes 1.9–2.5 times as long as wide; spikes 1–2(–3) per stem; pistillate portion of spike ovate to oblong; perigynia widely radiating, the proximal reflexed; beak usually smooth. Carex squarrosa
3 Style deciduous, straight; achenes 1.2–1.9 times as long as wide; spikes (1–)2–4(–6) per stem; pistillate portion of spike oblong to elliptic; perigynia, including the proximal, appressed-ascending; beak often sparingly scabrous. Carex typhina

"shortened" is not a number."not undefined" is not a number.

... more about "Carex sect. Squarrosae"
trigonous +
smaller +
beaked +  and truncate +
obtuse;awned +
Bruce A. Ford +  and A. A. Reznicek +
J. Carey +
rounded-tapering +  and tapering +
1.2 +  and 3.8 +
bidentate +
v--shaped +  and septate-nodulose +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
indistinct +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
redbrown +  and brown +
round +  and trigonous +
Temperate regions of e and mid w North America and temperate South America +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
prophyllate +  and pedunculate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
stipitate +, sessile +  and many-veined +
ascending +  and spreading +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
thread-like;leaflike +
Carices North. U.S., +
adventitious +
basal +  and proximal +
2-keeled +
cylindric +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
Carex sect. Squarrosae +
section +
gyncecandrous +  and staminate +
0.3 cm3 mm <br />0.003 m <br /> (?) +
plant +, colonial +  and cespitose +