Carex debilis var. debilis

IllustratedEndemic
Synonyms: Carex debilis var. intercursa A. Gray Carex debilis var. puesa
Treatment appears in FNA Volume 23. Treatment on page 469. Mentioned on page 468.

Lateral spikes pistillate, perigynia overlapping, attached 3–6 mm apart. Pistillate scales with hyaline margins white or pale, apex usually blunt to acute, rarely cuspidate. Perigynia fusiform, 5.5–8.7 mm, apex tapering gradually to elongate beak, nearly 1/2 length of perigynium. 2n = 52, 54, 55, 56.


Phenology: Fruiting early–mid summer.
Habitat: Edges, openings, paths and stream banks in mesic deciduous forest, floodplain forests, meadows, wet prairies, and roadsides, usually on soils with pH below 6
Elevation: less tham 500 m

Distribution

V23 859-distribution-map.jpg

Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Ky., La., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va.

Discussion

Most specimens of Carex debilis var. debilis have glabrous perigynia, but those with pubescent perigynia occur sporadically through the eastern part of its range, usually in mixed populations with the glabrous form. This southern variety extends north along the coastal plain to Nantucket Island, Massachusetts and occurs sporadically in Michigan and Ohio along with other coastal plain disjuncts. Occasional sterile hybrids with C. venusta have been confirmed in Florida, North Carolina, and New Jersey and observed in South Carolina and Virginia.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

56 +, 55 +, 54 +  and 52 +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
trigonous +
1mm;1.5mm +
short-pubescent +  and glabrous +
Marcia J. Waterway +
Michaux +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
shortened +
pubescent +  and glabrous +
Hymenochlaenae +
1/2 length of perigynium +
elongate +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
m--shaped +
1mm;3.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
dark maroon +
round +  and trigonous +
Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
less tham 500 m +
hypogynous +  and subtending +
25 cm250 mm <br />0.25 m <br /> (100 cm1,000 mm <br />1 m <br />) +
biconvex +  and trigonous +
Edges, openings, paths and stream banks in mesic deciduous forest, floodplain forests, meadows, wet prairies, and roadsides, usually on soils with pH below 6 +
apart +  and separated +
2.5 cm25 mm <br />0.025 m <br /> (8 cm80 mm <br />0.08 m <br />) +
nodding +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
pale +, white +  and hyaline +
entire +  and bidentate +
red dotted +, reddish-brown +, pale brown-hyaline +, maroon +  and green +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
apart +  and overlapping +
red dotted +, green +  and olive-green +
0.5 cm5 mm <br />0.005 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
ascending +  and erect +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.87 cm8.7 mm <br />0.0087 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Fruiting early–mid summer. +
2-3(-4)-carpellate +
, +, suffused with maroon or suffused with chestnut-brown +, white +  and hyaline +
3 (?) +  and 1 (?) +
Fl. Bor.-Amer. +
adventitious +
red dotted +, , +, tinged with pale-brown or tinged with suffused with chestnut +  and white-hyaline +
basal +  and proximal +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
cylindric +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Illustrated +  and Endemic +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.15 cm1.5 mm <br />0.0015 m <br /> (?) +
deciduous +
2-3(-4)-fid +
Carex debilis var. intercursa +  and Carex debilis var. puesa +
Carex debilis var. debilis +
Carex debilis +
variety +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
plant +  and cespitose +
pubescent +  and glabrous +
not septate-nodulose +