Carex exilis

Dewey

Amer. J. Sci. Arts 14: 351, plate Q, figs. 53, 54. 1828.

Common names: Carex maigre
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 327. Mentioned on page 323, 326.

Culms 12–80 cm. Leaves 2–6 per culm; sheaths tight, inner band hyaline, 3.5–21 cm, apex concave, glabrous; ligules rounded, 0.8–1.8 × 0.6–1.6 mm; blades involute, 4–70 cm × 0.4–1.5 mm, widest leaf 0.8–1.5 mm wide. Inflorescences 0.6–4 cm; spike 1 (occasionally 1–3 smaller accessory spikes), gynecandrous with staminate portion of spike 1–3 mm wide, to 50-flowered and pistillate portion of spike 5–9.5 mm wide, to 27-flowered or plants sometimes unisexual with staminate and pistillate spikes on different plants. Pistillate scales ovate, 1.8–3.3 × 1.3–2.2 mm, apex acute. Staminate scales lanceolate to ovate, 1.7–5.5 × 1–2.2 mm, apex acute. Anthers (2–) 2.2–3.6 mm. Perigynia spreading to reflexed, castaneous to dark-brown, 15-veined abaxially, faintly 7-veined adaxially, lanceolate-ovate to broadly ovate, 2.6–4.7 × 1.25–2.3 mm, 1.3–2.65 times as long as wide; beak 0.5–1.7 mm, 0.2–0.65 length of body, serrulate, teeth blunt, to 0.35 mm, soft. Achenes ovate, 1.4–2.2 × 1.2–1.7 mm.


Phenology: Fruiting late spring–early summer.
Habitat: Fens, bogs
Elevation: 0–500 m

Distribution

V23 580-distribution-map.jpg

St. Pierre and Miquelon, N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Ala., Del., Maine, Md., Mass., Mich., Minn., Miss., N.H., N.J., N.Y., N.C., R.I., Vt., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Carex exilis"
0.14 cm1.4 mm <br />0.0014 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
much smaller +
1.2mm;1.7mm +
0.2 cm2 mm <br />0.002 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
A. A. Reznicek +
shortened +
white-hyaline +, hyaline +  and narrow +
rounded +  and cordate +
0.2 length of body;0.65 length of body +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
4 cm40 mm <br />0.04 m <br /> (70 cm700 mm <br />0.7 m <br />) +
inconspicuous +
v--shaped +
0.4mm;1.5mm +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex maigre +
0.8mm +  and 5mm +
round +  and trigonous +
12 cm120 mm <br />0.12 m <br /> (80 cm800 mm <br />0.8 m <br />) +
St. Pierre and Miquelon +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, Que. +, Ala. +, Del. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, N.H. +, N.J. +, N.Y. +, N.C. +, R.I. +, Vt. +  and Wis. +
0–500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Fens, bogs +
0.6 cm6 mm <br />0.006 m <br /> (4 cm40 mm <br />0.04 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (21 cm210 mm <br />0.21 m <br />) +
sessile +, staminate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.6mm +  and 1.6mm +
with (1-)3-6(-30) bristles and/or scales +
7-veined +  and 15-veined +
castaneous +  and dark-brown +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
spreading +  and reflexed +
0.125 cm1.25 mm <br />0.00125 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
pistillate +, 50-flowered +  and staminate +
0.5 cm5 mm <br />0.005 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
3 (?) +  and 1 (?) +
Amer. J. Sci. Arts +
adventitious +
staminate +  and pistillate +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
basal +  and proximal +
lanceolate;ovate +
1mm;2.2mm +
cylindric +
Illustrated +  and Endemic +
pistillate +, staminate +  and 27-flowered +
gynecandrous +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex exilis +
Carex sect. Stellulatae +
species +
staminate +  and pistillate +
0 cm0 mm <br />0 m <br /> (0.035 cm0.35 mm <br />3.5e-4 m <br />) +
0.8mm +  and 1.5mm +