Carex muehlenbergii var. enervis

Boott

Ill. Carex, 3: 124, plate 400. 1862.

Common names: Carex à utricule lisse
IllustratedEndemic
Synonyms: Carex onusta Mackenzie Carex plana Mackenzie
Treatment appears in FNA Volume 23. Treatment on page 294. Mentioned on page 293.

Pistillate scales 2–2.5 × 1.2–1.8 mm. perigynia veinless adaxially, 2.7–3.1 × 1.8–2.3 mm, beak 0.2–0.6 (–1.0) mm.


Phenology: Fruiting late spring–early summer.
Habitat: Dry grasslands, open forests, commonly on sand
Elevation: 10–300 m

Distribution

V23 505-distribution-map.jpg

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

Discussion

The distribution and ecology of Carex muehlenbergii var. enervis are unclear due to confusion with var. muehlenbergii. Plants of var. muehlenbergii that have a veinless perigynium have often been misidentified as var. enervis, but those plants are otherwise identical to var. muehlenbergii. Carex muehlenbergii var. muehlenbergii usually occurs on basic to slightly acidic soils; var. enervis often occurs on more acidic soils. It is not clear, however, whether that correlation is consistent.

Selected References

None.

Lower Taxa

None.

"with awn" is not a number.

0.19 cm1.9 mm <br />0.0019 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
suborbiculate +
smaller +
1.9mm;2.1mm +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Peter W. Ball +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
shortened +
white-hyaline +, hyaline +  and narrow +
red tinged +  and brown +
rounded +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
bidentate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
ovate +  and ovate-circular +
Carex à utricule lisse +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (90 cm900 mm <br />0.9 m <br />) +
0.7mm;1.1mm +
Ont. +, Ala. +, Ark. +, Conn. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +  and W.Va. +
10–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry grasslands, open forests, commonly on sand +
, +  and racemose +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
usually wider than long +
with (1-)3-6(-30) bristles and/or scales +
pale green +  and yellowbrown +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
spreading +  and ascending +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Ill. Carex, +
adventitious +
hyaline with green +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
basal +  and proximal +
2-keeled +
1.2mm;1.8mm +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex onusta +  and Carex plana +
Carex muehlenbergii var. enervis +
Carex muehlenbergii +
variety +
rhizomatous +  and short-rhizomatous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +