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Photo is of parent taxon

carex à utricule lisse, Muhlenberg's sedge

Perigynia

veinless adaxially, 2.7–3.1 × 1.8–2.3 mm, beak 0.2–0.6(–1.0) mm.

Pistillate

scales 2–2.5 × 1.2–1.8 mm.

Carex muehlenbergii var. enervis

Phenology Fruiting late spring–early summer.
Habitat Dry grasslands, open forests, commonly on sand
Elevation 10–300 m (0–1000 ft)
Distribution
from FNA
AL; AR; CT; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MN; MO; MS; NC; NE; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WV; ON
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 23, p. 294.
Parent taxa Cyperaceae > Carex > sect. Phaestoglochin > Carex muehlenbergii
Sibling taxa
C. muehlenbergii var. muehlenbergii
Synonyms C. onusta, C. plana
Name authority Boott: Ill. Carex, 3: 124, plate 400. (1862)
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