Carex canescens subsp. disjuncta

(Fernald) Toivonen

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

Common names: Carex disjoint
IllustratedEndemic
Basionyms: 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.

No values specified.

0.125 cm1.25 mm <br />0.00125 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
dull +  and slightly glossy +
oblong-obovate +
smaller +
1mm;1.25mm +
beaked +  and beakless +
papillose +  and smooth +
Heikki Toivonen +
(Fernald) Toivonen +
shortened +
truncate +  and rounded +
Carex canescens var. disjuncta +
inconspicuous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pale green +  and gray-green +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
v--shaped +
subequal +  and shorter +
2mm;4mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
brownish tinged +
subequal +
Carex disjoint +
not stiff +
round +  and trigonous +
30 cm300 mm <br />0.3 m <br /> (90 cm900 mm <br />0.9 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
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 +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet, usually base-poor habitats, such as sphagnum bogs, moist coniferous forests and meadows, from lowlands to near the timberline in mountains +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 m <br />) +
red tinged +  and hyaline +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
slightly longer than wide +
angled;rounded +
conspicuous +
with (1-)3-6(-30) bristles and/or scales +
yellowish-brown +  and gray-green +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
appressed-ascending +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Fruiting Apr–Jul. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
Ann. Bot. Fenn. +
adventitious +
hyaline with green +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
gynecandrous +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex disjuncta +
Carex canescens subsp. disjuncta +
Carex canescens +
subspecies +
plant +  and cespitose +