Carex disperma

Dewey

Amer. J. Sci. Arts 8: 266. 1824.

Common names: Carex disperme
Illustrated
Synonyms: Carex tenella Schkuhr
Treatment appears in FNA Volume 23. Treatment on page 298. Mentioned on page 296.

Plants with loose, branching system of slender, pale-brown rhizomes. Culms very slender, nodding, 15–60 cm, exceeding leaves, scabrid. Leaves: basal sheaths pale-brown abaxially, inner band white-hyaline, truncate at summit; ligules broader than long; blades mid to dark green, flat, 15–30 × 0.75–1.5 mm, scabrid. Inflorescences 1.5–2.5 cm × 3–5 mm; proximal bract 5–20 mm; distal bracts scalelike. Spikes 2–4 (–5), proximal separate, distal aggregate, globose, 3–5 × 2–4 mm. Pistillate scales white-hyaline with green center, ovate, narrower and shorter than perigynia, apex acuminate. Perigynia 1–6, pale green, often brown or even purplish in age, plump, 2.25–3 × 1.3–1.5 mm, membranous, shiny. Achenes redbrown, oblongelliptic, 1.5–1.75 × 1 mm, glossy. 2n = 70.


Phenology: Fruiting May–Aug.
Habitat: Swamps, bogs, wet meadows, mossy and shady coniferous woods
Elevation: 0–3500 m

Distribution

V23 517-distribution-map.jpg

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Calif., Colo., Conn., Idaho, Ind., Maine, Mass., Mich., Minn., Mont., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Oreg., Pa., S.Dak., Utah, Vt., Wash., Wis., Wyo., Eurasia

Discussion

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."narrower" is not a number.

... more about "Carex disperma"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.175 cm1.75 mm <br />0.00175 m <br />) +
oblongelliptic +
acuminate +
Heikki Toivonen +
not +  and fibrous +
rounded +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
v--shaped +
0.075 cm0.75 mm <br />7.5e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex disperme +
round +  and trigonous +
slender +
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, Conn. +, Idaho +, Ind. +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wis. +, Wyo. +  and Eurasia +
0–3500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Swamps, bogs, wet meadows, mossy and shady coniferous woods +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
broader than long +
with (1-)3-6(-30) bristles and/or scales +
stipitate +  and veined +
purplish +, brown +  and pale green +
0.225 cm2.25 mm <br />0.00225 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Fruiting May–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Amer. J. Sci. Arts +
adventitious +
white-hyaline +
narrower and shorter +
basal +  and proximal +
cylindric +
Illustrated +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex tenella +
Carex disperma +
Carex sect. Dispermae +
species +