Carex atherodes

Sprengel

Syst. Veg. 3: 828. 1826.

Common names: Carex épi-de-blé
Illustrated
Treatment appears in FNA Volume 23. Treatment on page 499. Mentioned on page 498, 500.

Culms hollow, ± spongy near base, trigonous in cross-section, 35–125 cm; vegetative culms hollow, flattened when pressed, taller than fertile culms. Leaves: basal sheaths reddish purple, inner bands fibrillose with age; sheaths with apex of inner band pale-brown to dull reddish purple, pubescent or scabrous, at least apically, rarely glabrous; ligules (6–) 11–45 mm; blades 3–10 mm wide, usually sparsely to moderately long-pubescent, finely papillose abaxially, glabrous adaxially. Inflorescences 12–60 cm; spikes erect or ascending; proximal 2–5 spikes pistillate; terminal (1–) 2–6 spikes staminate. Pistillate scales lanceolate to narrowly ovate, apex acute, conspicuously scabrous-awned, glabrous or scabrous near midrib. Staminate scales lanceolate to narrowly ovate, apex obtuse to acuminate, scabrous-awned, glabrous or, rarely, sparsely pubescent. Perigynia 12–21-veined, (6.5–) 7–12 × 1.8–3.8 mm, glabrous; beak 2.1–4 mm, glabrous (rarely few spreading hairs on main veins), teeth spreading to outcurved, (1.2–) 1.5–3 mm.


Phenology: Fruiting Jun–Aug.
Habitat: Marshes, wet prairies and meadows, open swamps, wet, open thickets, open stream, pond, and lakeshores, ditches, often in water (to 60–80 cm deep)
Elevation: 50–2800 m

Distribution

V23 928-distribution-map.jpg

Alta., B.C., Man., N.W.T., Ont., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Ill., Ind., Iowa, Maine, Mich., Minn., Mo., Mont., Nebr., Nev., N.Mex., N.Y., N.Dak., Ohio, Oreg., Pa., S.Dak., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Eurasia

Discussion

Carex atherodes is a major wetland species in portions of the Midwest and West and becomes increasingly uncommon and local in the eastern portions of its range. It forms large clones and can tolerate deeper water than most Carex. Glabrous forms occur and seem to be more common in the western portion of the range.

Carex atherodes rarely hybridizes with C. trichocarpa.

Selected References

None.

Lower Taxa

None.

"taller" is not a number."less" is not a number.

... more about "Carex atherodes"
trigonous +
smaller +
pubescent +  and glabrous +
pale-brown +  and dull reddish purple +
pubescent +, , +, glabrous +  and scabrous +
A. A. Reznicek +  and Paul M. Catling +
Sprengel +
shortened +
rounded +
bidentate +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glabrous +  and long-pubescent +
papillose +
m-shaped +  and flat +
3mm;10mm +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex épi-de-blé +
redbrown +  and brown +
fertile +  and vegetative +
flattened +  and trigonous +
35 cm350 mm <br />0.35 m <br /> (125 cm1,250 mm <br />1.25 m <br />) +
acute +  and short-awned +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, S.Dak. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +  and Eurasia +
50–2800 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Marshes, wet prairies and meadows, open swamps, wet, open thickets, open stream, pond, and lakeshores, ditches, often in water (to 60–80 cm deep) +
12 cm120 mm <br />0.12 m <br /> (60 cm600 mm <br />0.6 m <br />) +
staminate +, prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
1.1 cm11 mm <br />0.011 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
Fruiting Jun–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
staminate +  and pistillate +
basal +  and proximal +
lanceolate;narrowly ovate +
shorter or longer +
glabrous +, scabrous +  and pubescent +
cylindric +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
W1 +  and Illustrated +
staminate +  and pistillate +
ascending +  and erect +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
persistent +
2-3(-4)-fid +
Carex atherodes +
Carex sect. Carex +
species +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
outcurved +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
plant +  and cespitose +