Carex leavenworthii

Dewey

Amer. J. Sci. Arts, ser. 2, 2: 246. 1846.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 295. Mentioned on page 286, 287, 293, 296.

Plants without conspicuous rhizomes. Culms 10–80 cm, 1–2.4 mm wide basally, 0.5–1 mm wide distally. Leaves: sheaths tight, green or, sometimes, green-and-white-mottled, fronts hyaline; ligules to 2 mm, usually longer than wide; widest leaf-blades 1.1–3 (–4) mm wide. Inflorescences forming dense heads, with 3–8 spikes, 0.7–2 cm × 4.5–9 mm; proximal bracts to 2 cm; spikes with 6–10 ascending or spreading perigynia. Pistillate scales hyaline with green midvein, ovate, 1.5–2.5 × 0.9–1.2 mm, not more than 1/2 length of perigynia, apex acute to cuspidate. Anthers 0.6–1.7 mm. Perigynia pale green, veinless or weakly veined abaxially, 2.5–3.5 × 1.5–2.1 mm, body ovate, widest at 0.25–0.4 length of body, margins smooth or serrulate distally; beak 0.3–0.8 mm, apical teeth 0.1–0.3 mm. Achenes circular, 1–1.5 × 1–1.5 mm.


Phenology: Fruiting late spring.
Habitat: Dry grasslands, roadsides, open forests, forest edges, lawns
Elevation: 100–300 m.

Distribution

V23 511-distribution-map.jpg

Ont., Ala., Ark., Calif., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mich., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va., Wis.

Discussion

Carex leavenworthii is introduced in California and Wisconsin. Carex leavenworthii is easily confused with C. cephalophora and consequently may be overlooked.

Selected References

None.

Lower Taxa

None.

"widest" is not a number.No values specified.

... more about "Carex leavenworthii"
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
biconvex +
smaller +
1mm;1.5mm +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Peter W. Ball +
shortened +
white-hyaline +, hyaline +  and narrow +
red tinged +  and brown +
rounded +
bidentate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
v--shaped +
0mm;20mm +
0.25 +  and 0.4 +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
10 cm100 mm <br />0.1 m <br /> (80 cm800 mm <br />0.8 m <br />) +
0.5mm;1mm +
Ont. +, Ala. +, Ark. +, Calif. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, W.Va. +  and Wis. +
100–300 m. +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry grasslands, roadsides, open forests, forest edges, lawns +
, +  and racemose +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
usually longer than wide +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
serrulate +  and smooth +
with (1-)3-6(-30) bristles and/or scales +
veined +  and veinless +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
spreading +  and ascending +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Fruiting late spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Amer. J. Sci. Arts, ser. +
adventitious +
basal +  and proximal +
0.9mm;1.2mm +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex leavenworthii +
Carex sect. Phaestoglochin +
species +
rhizomatous +  and short-rhizomatous +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +