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 yellow-brown, 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
... more about "Carex muehlenbergii"
Peter W. Ball +
Schkuhr ex Willdenow +
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. +
Illustrated +  and Endemic +
Carex muehlenbergii +
Carex sect. Phaestoglochin +
species +