Carex debilis var. rudgei

L. H. Bailey

Mem. Torrey Bot. Club 1: 34. 1889.

Common names: Carex de Rudge
IllustratedEndemic
Synonyms: Carex allegheniensis Mackenzie Carex debilis var. intercursa Fernald Carex debilis var. interjecta L. H. Bailey Carex debilis var. pubera A. Gray Carex debilis var. strictior L. H. Bailey Carex flexuosa Carex tenuis
Treatment appears in FNA Volume 23. Treatment on page 469. Mentioned on page 468, 470, 471.

Lateral spikes pistillate, perigynia only slightly overlapping, attached 2–9 mm apart. Pistillate scales with hyaline margins usually suffused or streaked with dark red or chestnut, acute to often cuspidate. Perigynia lance-ellipsoid, 5–6.2 mm, apex rather abruptly narrowed to beaked; beak 5–6.2 mm. 2n = 50, 52, 54, 56, 60.


Phenology: Fruiting summer.
Habitat: Edges, openings, paths and stream banks in dry to mesic deciduous forest, meadows, wet prairies, roadsides, usually on soils with pH below 6

Distribution

V23 860-distribution-map.jpg

N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Conn., Del., D.C., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., N.H., N.Y., N.C., Pa., R.I., Tenn., Vt., Va., W.Va., Wis.

Discussion

Most collections of the northern variety, Carex debilis var. rudgei, have glabrous perigynia, but those with pubescent perigynia can be found in the southeastern part of the range, especially in the mountains. The two forms often grow together in the same population. Hybrids with both C. virescens and C. swanii occur sporadically throughout their common range. A rare hybrid with C. castanea occurs in the northern part of its range.

Selected References

None.

Lower Taxa

None.
... more about "Carex debilis var. rudgei"
Marcia J. Waterway +
L. H. Bailey +
Hymenochlaenae +
Carex de Rudge +
N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ind. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.Y. +, N.C. +, Pa. +, R.I. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
Edges, openings, paths and stream banks in dry to mesic deciduous forest, meadows, wet prairies, roadsides, usually on soils with pH below 6 +
Fruiting summer. +
Mem. Torrey Bot. Club +
Illustrated +  and Endemic +
Carex allegheniensis +, Carex debilis var. intercursa +, Carex debilis var. interjecta +, Carex debilis var. pubera +, Carex debilis var. strictior +, Carex flexuosa +  and Carex tenuis +
Carex debilis var. rudgei +
Carex debilis +
variety +