Carex communis

L. H. Bailey

Mem. Torrey Bot. Club 1: 41. 1889.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 539. Mentioned on page 532, 533, 534, 536.

Plants densely cespitose; rhizomes ascending, reddish-brown to purplish brown, 0–3 mm, stout or absent. Culms 20–60 cm, scabrous distally; bases (remnants of old leaves) slightly or not fibrous. Leaf-blades green, 1.8–5 mm wide, widest leaves 3+ mm wide, herbaceous, papillose to scabrous abaxially, papillose to scabrous adaxially. Inflorescences usually with both staminate and pistillate spikes, rarely only pistillate; peduncle of staminate spike 0.7–9.7 mm; proximal nonbasal bracts leaflike, usually shorter than inflorescences. Spikes: proximal pistillate spikes 2–3 (basal spike 0); cauline spikes usually clearly separated, with 3–10 perigynia; staminate spikes 3.1–15.5 × 1–2.5 mm. Scales: pistillate scales pale-brown to dark reddish-brown, often with broad white margins, ovate to lanceolate, 2.5–4.8 × 1.2–2 mm, shorter than to exceeding perigynia, apex obtuse to acuminate or short-awned; staminate scales elliptic to obovate, 3.1–5.2 × 0.7–2.2 mm, apex obtuse to acuminate or short-aristate. Anthers 1.8–3 mm. Perigynia pale green, veinless, globose to obovoid, 2.7–3.8 × 1.2–2.6 mm, as long as wide; beak usually straight, occasionally slightly bent, pale green, 0.5–2.3 mm, weakly ciliate-serrulate, apical teeth 0.1–0.5 mm. Stigmas 3. Achenes pale-brown, globose to obovoid, round to obtusely trigonous in cross-section, 1.4–2.3 × 1–1.4 mm.

Distribution

V23 1014-distribution-map.jpg

N.B., N.S., Ont., Que., Ark., Conn., Del., Ga., Ill., Ind., Ky., Maine, Mass., Md., Mich., Minn., Mo., N.C., N.H., N.J., N.Y., Ohio, Pa., R.I., S.C., Tenn., Va., Vt., W.Va., Wis.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Apical teeth of perigynium beak usually 0.1–0.2(–0.3) mm; pistillate scales usually 1.6 mm wide or less. Carex communis var. communis
1 Apical teeth of perigynium beak usually more than 0.2 mm; pistillate scales usually more than 1.6 mm wide. Carex communis var. amplisquama

No values specified.

... more about "Carex communis"
0.14 cm1.4 mm <br />0.0014 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
globose;obovoid round +
1mm;1.4mm +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
beaked +, awned +  and cuspidate +
glabrous +  and pubescent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
William J. Crins +  and Jeff H. Rettig +
L. H. Bailey +
shortened +
rounded +  and tapering +
not fibrous +
ciliate-serrulate +
straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
v--shaped +
2mm;4.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
brown +  and red +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
N.B. +, N.S. +, Ont. +, Que. +, Ark. +, Conn. +, Del. +, Ga. +, Ill. +, Ind. +, Ky. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Mo. +, N.C. +, N.H. +, N.J. +, N.Y. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Va. +, Vt. +, W.Va. +  and Wis. +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
prophyllate +, pedunculate +, staminate +, , +  and pistillate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like +  and filiform +
Mem. Torrey Bot. Club +
reddish-brown +  and purplish brown +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
adventitious +
staminate +  and pistillate +
pale-brown +  and dark reddish-brown +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
basal +  and proximal +
elliptic;obovate +
0.7mm;2.2mm +
cylindric +
Illustrated +  and Endemic +
staminate +  and pistillate +
0.31 cm3.1 mm <br />0.0031 m <br /> (1.55 cm15.5 mm <br />0.0155 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.97 cm9.7 mm <br />0.0097 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Montanae +
Carex communis +
Carex sect. Acrocystis +
species +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
stoloniferous +  and rhizomatous +
plant +  and cespitose +