Carex canescens subsp. disjuncta

(Fernald) Toivonen

Ann. Bot. Fenn. 18: 94. 1981.

Common names: Carex disjoint
IllustratedEndemic
Basionym: Carex canescens var. disjuncta Fernald Proc. Amer. Acad. Arts 37: 488, plate 5, figs. 118–120. 1902
Synonyms: Carex disjuncta
Treatment appears in FNA Volume 23. Treatment on page 318. Mentioned on page 317.

Culms 30–90 cm. Inflorescences 6–12(–15) cm, all but distalmost spikes distant, proximal 2 spikes 2–5 cm apart. 2n = 54.


Phenology: Fruiting Apr–Jul.
Habitat: Wet, usually base-poor habitats, such as sphagnum bogs, moist coniferous forests and meadows, from lowlands to near the timberline in mountains
Elevation: 0–3500 m

Distribution

V23 559-distribution-map.jpg

St. Pierre and Miquelon, N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Conn., Del., D.C., Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Vt., Va., Wis.

Discussion

Carex canescens subsp. disjuncta is a dominating subspecies in the southern part of the range of the species in eastern North America; it grades into subsp. canescens in northern areas. Subspecies disjuncta differs from subsp. canescens in its longer culms (to 90 cm), leaves, inflorescences [1–12(–15) cm], and spikes. The subglobular spikes are often more numerous and the proximal separated by 2–5 cm. The perigynia are slightly longer, clearly wider and more abruptly beaked than in the type subspecies.

Selected References

None.

Lower Taxa

None.
Heikki Toivonen +
(Fernald) Toivonen +
Carex canescens var. disjuncta +
Carex disjoint +
St. Pierre and Miquelon +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Del. +, D.C. +, Ill. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Vt. +, Va. +  and Wis. +
0–3500 m +
Wet, usually base-poor habitats, such as sphagnum bogs, moist coniferous forests and meadows, from lowlands to near the timberline in mountains +
Fruiting Apr–Jul. +
Ann. Bot. Fenn. +
Illustrated +  and Endemic +
Carex disjuncta +
Carex canescens subsp. disjuncta +
Carex canescens +
subspecies +