Carex mesochorea

Mackenzie

Bull. Torrey Bot. Club 37: 246. 1910.

Common names: Carex de l’arrière-pays
IllustratedEndemic
Basionym: Carex mediterranea Mackenzie Bull. Torrey Bot. Club 33: 441. 1906,
Synonyms: Carex cephalophora var. mesochorea (Mackenzie) Gleason
Treatment appears in FNA Volume 23. Treatment on page 295. Mentioned on page 287, 293.

Plants without conspicuous rhizomes. Culms 15–100 cm, 1.5–3 mm wide basally, 0.9–1.1 mm wide distally. Leaves: sheaths tight, green, fronts hyaline, yellowbrown and thickened at mouth; ligules to 3 mm, wider than long; blades 2.5–4 mm at widest. Inflorescences forming dense heads, with 4–8 spikes, 1–1.5 times as long as wide, 1–2 cm × 9–14 mm; proximal bracts not more than 2 cm; spikes with 8–20 ascending to spreading perigynia. Pistillate scales brownish to green-hyaline with green, 3-veined center, ovate, 2.3–3.1 × 1.2–2 mm, narrower than and as long as perigynia, apex cuspidate to short-awned. Anthers 1.1–1.7 mm. Perigynia pale green to pale-brown, weakly veined or veinless abaxially, 3–4.1 × (1.7–) 2–2.6 mm, margins serrulate distally; beak 0.8–1 mm, apical teeth 0.2–0.3 mm. Achenes suborbiculate, 1.5–1.7 × 1.3–1.5 mm.


Phenology: Fruiting late spring–early summer.
Habitat: Dry grasslands, roadsides, railroads
Elevation: 100–300 m

Distribution

V23 509-distribution-map.jpg

Ont., Ala., Calif., Conn., D.C., Ga., Ill., Ind., Kans., Ky., Md., Mass., Mich., Mo., Nebr., N.J., N.Y., N.C., Ohio, Pa., S.C., Tenn., Tex., Va., W.Va.

Discussion

Carex mesochorea is naturalized in California and is probably not native at the northern and eastern limits of its range.

Selected References

None.

Lower Taxa

None.

No values specified.

... more about "Carex mesochorea"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
suborbiculate +
smaller +
1.3mm;1.5mm +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
cuspidate +  and short-awned +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Peter W. Ball +
Mackenzie +
shortened +
white-hyaline +, hyaline +  and narrow +
red tinged +  and brown +
rounded +
Carex mediterranea +
bidentate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
v--shaped +
0.25 cm2.5 mm <br />0.0025 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
Carex de l’arrière-pays +
round +  and trigonous +
15 cm150 mm <br />0.15 m <br /> (100 cm1,000 mm <br />1 m <br />) +
0.9mm;1.1mm +
Ont. +, Ala. +, Calif. +, Conn. +, D.C. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, Md. +, Mass. +, Mich. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
100–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
yellowbrown +  and hyaline +
biconvex +  and trigonous +
Dry grasslands, roadsides, railroads +
, +  and racemose +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
wider than long +
with (1-)3-6(-30) bristles and/or scales +
veinless +  and veined +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pale green +  and pale-brown +
0.3 cm3 mm <br />0.003 m <br /> (0.41 cm4.1 mm <br />0.0041 m <br />) +
ascending +  and spreading +
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Bull. Torrey Bot. Club +
adventitious +
brownish +  and green-hyaline with green +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex cephalophora var. mesochorea +
Carex mesochorea +
Carex sect. Phaestoglochin +
species +
rhizomatous +  and short-rhizomatous +