Carex lupulina

Willdenow

Sp. Pl. 4(1): 266. 1805.

Common names: Carex houblon
IllustratedEndemic
Treatment appears in FNA Volume 23. Mentioned on page 508, 509, 512.

Plants loosely cespitose or not, short-rhizomatous. Culms solitary or not, erect, 20–100 (–130) cm. Leaves 4–8; basal sheaths reddish to brownish; sheath of distal leaf (1.3–) 1.7–10 (–25) cm; ligules triangular, 3.5–18 mm; blades 15–64 cm × 4–15 mm. Inflorescences 4–40 cm; peduncles of proximal spikes 0.5–20 cm, basal 2 peduncles 1–20 cm apart of terminal spike 0.5–6 (–7) cm, shorter than or exceeding distal pistillate spike by 2 cm or less; bracts leafy, sheaths 0.5–15 cm, blades 13–55 cm × 3–11 mm. Spikes: proximal pistillate spikes (1–) 2–5, distal spikes usually ± crowded, ascending, densely (4–) 8–80-flowered, ovoid to cylindric, 1.5–6.5 × 1.3–3 cm; terminal staminate spikes 1 (–2), 1.5–8.5 cm × 1–5 mm. Pistillate scales 1–7-veined, lanceolate to lanceolate-ovate, 6–15 × 1–2.7 mm, apex acute to awned, awns rough, to 6 mm. Anthers 3, 3–5.5 mm. Perigynia ascending, strongly 13–22-veined, ± stipitate, lanceovoid, 11–19 × 3–6 mm, shiny, glabrous; beak conic, 6–10 mm. Achenes stipitate, rhomboid, flat to concave faces, angles smoothly thickened, not pointed or nobbed, 3–4 (–4.5) × 1.7–2.6 (–2.8) mm; style same texture as achene.


Phenology: Fruiting late spring–summer.
Habitat: Wet, deciduous or mixed swamp forests, forest openings, wet meadows
Elevation: 0–700 m

Distribution

V23 957-distribution-map.jpg

N.B., N.S., Ont., Que., Ala., Ark., Conn., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

Occasional specimens have been seen that appear to be sterile hybrids of Carex lupulina with C. retrorsa or C. lurida.

Selected References

None.

Lower Taxa

None.

"less" is not a number.

... more about "Carex lupulina"
flat;concave +
smaller +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1.7mm;2.6mm +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
hairy +  and glabrous +
A. A. Reznicek +
Willdenow +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
shortened +
reddish;brownish +
cuneate +  and rounded +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
13 cm130 mm <br />0.13 m <br /> (55 cm550 mm <br />0.55 m <br />) +
v--shaped +
3mm;11mm +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex houblon +
brown +, reddish +  and purplish +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
prophyllate +, pedunculate +  and staminate +
(4-)8-80-flowered +  and pistillate +
1.5 cm15 mm <br />0.015 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (3 cm30 mm <br />0.03 m <br />) +
N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–700 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet, deciduous or mixed swamp forests, forest openings, wet meadows +
4 cm40 mm <br />0.04 m <br /> (40 cm400 mm <br />0.4 m <br />) +
septate-nodulose +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (10 cm100 mm <br />0.1 m <br />) +
triangular +
0.35 cm3.5 mm <br />0.0035 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1 cm10 mm <br />0.01 m <br /> (20 cm200 mm <br />0.2 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
stipitate +  and 13-22-veined +
1.1 cm11 mm <br />0.011 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Fruiting late spring–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
1-7-veined +  and pistillate +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
basal +  and proximal +
lanceolate;lanceolate-ovate +
1mm;2.7mm +
shorter or longer +
septate-nodulose +
0.5 cm5 mm <br />0.005 m <br /> (15 cm150 mm <br />0.15 m <br />) +
W2 +, W1 +, Illustrated +  and Endemic +
0.5 cm5 mm <br />0.005 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
persistent +
2-3(-4)-fid +
Carex lupulina +
Carex sect. Lupulinae +
species +
6 cm60 mm <br />0.06 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
plant +, not +  and cespitose +