Carex muehlenbergii

Schkuhr ex Willdenow

Sp. Pl. 4(1): 231. 1805.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 293. Mentioned on page 288, 295.

Plants without conspicuous rhizomes. Culms 20–90 cm, 1.7–2.2 mm wide basally, 0.7–1.1 mm wide distally. Leaves: sheaths tight, green, sometimes white spotted, fronts hyaline, sometimes transversely rugose, mouth yellowish and thickened; ligules to 3 mm, usually wider than long; widest leaf-blades 2–4 mm wide, papillose adaxially. Inflorescences with 3–10 spikes, 1.5–4 cm × 8–12 mm; proximal internodes equaling or shorter than proximal spikes; proximal bracts less than 2 cm; spikes with 8–20 ascending or spreading perigynia. Pistillate scales hyaline with green, 3-veined center, ovate to ovate-circular, body narrower than and 2/3 to length of perigynium, apex acute or with awn 0.5–1.5 (–2) mm. Anthers 1.5–2.3 mm. Perigynia pale green to yellowbrown, 9–15-veined abaxially, margins serrulate distally; beak 0.2–1.2mm, apical teeth 0.2–0.5 mm. Achenes suborbiculate, 1.9–2.2 × 1.9–2.1 mm.

Distribution

V23 503-distribution-map.jpg

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

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Pistillate scales 2.5–3.6 mm; perigynia 5–9-veined or veinless adaxially, 3–4.2 mm. Carex muehlenbergii var. muehlenbergii
1 Pistillate scales 2–2.5 mm; perigynia veinless adaxially, 2.7–3.1 mm. Carex muehlenbergii var. enervis

"with awn" is not a number."widest" is not a number.

... more about "Carex muehlenbergii"
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 +
Schkuhr ex Willdenow +
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 +
bidentate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 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 +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (90 cm900 mm <br />0.9 m <br />) +
0.7mm;1.1mm +
Ont. +, Que. +, Ala. +, Ark. +, Conn. +, D.C. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, N.C. +, N.H. +, N.J. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +, Vt. +, W.Va. +  and Wis. +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
, +  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 +
spreading +  and ascending +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adventitious +
hyaline with green +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex muehlenbergii +
Carex sect. Phaestoglochin +
species +
rhizomatous +  and short-rhizomatous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +