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 lanceellipsoid, 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.

"thick" is not a number.

... more about "Carex debilis var. rudgei"
60 +, 56 +, 54 +, 52 +  and 50 +
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 +
L. H. Bailey +
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 body +
bidentate +
0.5 cm5 mm <br />0.005 m <br /> (0.62 cm6.2 mm <br />0.0062 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 +
Carex de Rudge +
dark maroon +
round +  and trigonous +
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. +
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 dry to mesic deciduous forest, meadows, wet prairies, 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 +
, +, streaked with dark red or streaked with chestnut +, suffused +  and hyaline +
acute to often +
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 +
0.5 cm5 mm <br />0.005 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Fruiting summer. +
2-3(-4)-carpellate +
, +, suffused with maroon or suffused with chestnut-brown +, white +  and hyaline +
3 (?) +  and 1 (?) +
Mem. Torrey Bot. Club +
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 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 +
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 +