Carex virescens

Muhlenburg ex Willdenow

Sp. Pl. 4(1): 251. 1805.

Common names: Carex virescent
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 483. Mentioned on page 4, 466, 467, 468, 469, 470, 482.

Culms 30–100 cm, sparsely pilose. Leaves: sheaths pilose; ligules longer than wide; blades 2–4 mm wide, pilose. Inflorescences: lateral spikes (18–) 20–35 × 2.5–3.5 mm, proximal distant; terminal spike gynecandrous, at least 1/2 of flowers pistillate, 20–35 (–40) mm. Pistillate scales ovate-circular, 1.5–2.5 (–3.2) × 0.9–1.2 mm, apex of proximal obtuse, with awn to 0.5 mm, apex of distal acute to acuminate, as long as perigynia. Staminate scales ovate, 2.8–4.1 mm, apex obtuse to acuminate. Anthers (1–) 1.6–2 (–2.8) mm. Perigynia ascending, distinctly 7–12-veined, elliptic, trigonous in cross-section, 1.9–2.5 × 1–1.4 mm, densely pilose; beak absent. Achenes 1.5–2 × 0.8–1.1 mm. 2n = 60.


Phenology: Fruiting late spring–early summer.
Habitat: Dry to wet-mesic deciduous forests, banks
Elevation: 0–1000 m

Distribution

V23 890-distribution-map.jpg

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

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Carex virescens"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
trigonous +
0.8mm;1.1mm +
stipitate +, veinless +  and veined +
elliptic +  and broadly obovate rounded-trigonous +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
, +  and beakless +
pubescent +  and glabrous +
Peter W. Ball +
Muhlenburg ex Willdenow +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
shortened +
tapering +  and rounded +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
v--shaped +
2mm;4mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex virescent +
round +  and trigonous +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Ont. +, Que. +, Ark. +, Conn. +, Del. +, D.C. +, Ga. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Va. +  and W.Va. +
0–1000 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry to wet-mesic deciduous forests, banks +
prophyllate +, pedunculate +  and pistillate +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
longer than wide +
subentire +  and entire +
with (1-)3-6(-30) bristles and/or scales +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
staminate +  and pistillate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
basal +  and proximal +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.41 cm4.1 mm <br />0.0041 m <br />) +
0.9mm;1.2mm +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Virescentes +
Carex virescens +
Carex sect. Porocystis +
species +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
plant +  and cespitose +