Carex laevivaginata

(Kükenthal) Mackenzie in N. L. Britton and A. Brown

in N. L. Britton and A. Brown, Ill. Fl. N. U.S. ed. 2, 1: 371. 1913.

IllustratedEndemic
Basionym: Carex stipata var. laevivaginata Kükenthal in H. G. A. Engler, Pflanzenr. 20[IV,38]: 172. 1909
Treatment appears in FNA Volume 23. Mentioned on page 274.

Plants with basal sheaths of previous year not persistent. Culms to 80 cm × 2 mm, scabrous throughout. Leaves: sheaths all with blades, fronts smooth, lacking spots, veinless, apex yellow, thickened, truncate, cartilaginous, entire; ligules acute, 5 mm, free limb to 0.5 mm; blades yellow-green, epistomic, to 60 cm × 6 mm, papillose adaxially (25X). Inflorescences densely spicate, cylindric, elongate, with 6–15 distinguishable branches, 3–6 × 1.5 cm; proximal internode to 10 mm; proximal bracts setaceous, apparent. Scales hyaline. Perigynia pale-brown, redbrown distally, with redbrown veins, 10–12-veined abaxially, 7-veined adaxially, to 6 × 2.6 mm, base slightly distended proximally, cordate; stipe to 0.2 mm; beak to 2.5 mm, margins serrulate. Achenes ovate, 2 × 1.3 mm; stalk to 0.3 mm; persistent style base cylindric, 0.3 mm. 2n = 46.


Phenology: Fruiting May–Jun.
Habitat: Seasonally saturated or inundated soils in wet meadows, marshes, edges of tidal marshes, swamps, or alluvial bottomlands, particularly on calcareous substrates
Elevation: 0–1500 m

Distribution

V23 460-distribution-map.jpg

Ont., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Md., Mass., Mich., Minn., Mo., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Va., W.Va., Wis.

Discussion

Carex laevivaginata is readily distinguished from all other species in the section by the thickened, yellow sheath apex and the papillose, epistomic leaves.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Carex laevivaginata"
2 cm20 mm <br />0.02 m <br /> (?) +
smaller +
entire +  and truncate +
subentire;bidentate;tapering;obtuse;acuminate or short-awned +
Lisa A. Standley +
(Kükenthal) Mackenzie in N. L. Britton and A. Brown +
smooth +  and rugose +
membranous +
not persistent +
not +  and fibrous +
cordate +  and distended +
Carex stipata var. laevivaginata +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
yellow-green +
0 cm0 mm <br />0 m <br /> (60 cm600 mm <br />0.6 m <br />) +
papillose +
v--shaped +
6 cm60 mm <br />0.06 m <br /> (?) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
distinguishable +
parallel +  and divergent +
terete +, rolled +  and plicate +
dark-brown +  and black +
0 cm0 mm <br />0 m <br /> (80 cm800 mm <br />0.8 m <br />) +
round +  and trigonous +
Ont. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Va. +, W.Va. +  and Wis. +
0–1500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Seasonally saturated or inundated soils in wet meadows, marshes, edges of tidal marshes, swamps, or alluvial bottomlands, particularly on calcareous substrates +
paniculate +  and racemose +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
elongate +  and cylindric +
1.5 cm15 mm <br />0.015 m <br /> (?) +
prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
5 cm50 mm <br />0.05 m <br /> (?) +
with (1-)3-6(-30) bristles and/or scales +
7-veined +  and 10-12-veined +
redbrown +  and pale-brown +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
ascending +  and spreading +
0 cm0 mm <br />0 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Fruiting May–Jun. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
in N. L. Britton and A. Brown, Ill. Fl. N. U.S. ed. +
adventitious +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0 cm0 mm <br />0 m <br /> (?) +  and 0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +
0.3 cm3 mm <br />0.003 m <br /> (?) +
deciduous +
2-3(-4)-fid +
Carex laevivaginata +
Carex sect. Vulpinae +
species +