Carex crawei

Dewey

Amer. J. Sci. Arts, ser. 2, 2: 246. 1846.

Common names: Carex de Crawe
IllustratedEndemic
Treatment appears in FNA Volume 23. Mentioned on page 374.

Rhizomes long-creeping. Culms solitary (rarely 2 together), 2–30 (–40) cm. Leaves light green, cauline blades tending to recurved, 0.6–9.7 cm × 1.5–4.4 mm; widest leaves 1.8–3 (–4.4) mm wide. Inflorescences: peduncle of terminal spike (0.4–) 0.9–7.6 (–9.1) cm; bracts usually shorter than culms; ligule of proximal bract 0.1–2.2 mm; longest bract blade (per plant) of distal lateral spike 2–6.7 cm. Proximal spikes usually arising from proximal 1/2 of culms, 5–27 × 3.1–6.3 mm. Terminal spike (5–) 11–24 mm, usually separated from distal lateral spike (unless staminate). Pistillate scales ovate or ovate-triangular, 1.2–2.9 × 1.1–1.6 mm. Staminate scales with apex rounded to obtuse. Anthers 1.9–2.9 mm. Perigynia yellowish green to pale-brown, oblong-ovoid to ellipsoid, 2.2–3.4 (–3.7) × 1.1–1.9 mm, 1.4–2.6 times as long as thick; beak 0.1–0.3 mm, orifice entire or nearly so (teeth to 0.1 mm). Achenes 1.4–1.9 × 1–1.8 mm, not including prominent apiculus 0.2–0.4 mm. 2n = 38, 59, 60.


Phenology: Fruiting late spring–late summer (May–mid Aug).
Habitat: Dry to usually moist, open ground, often associated with calcareous gravels or limestone pavements, in wet meadows, fens, prairie swales, beach pools, shores and glades, less commonly edges of white-cedar thickets, prairie patches along rights-of-way, streams, ditches, and quarries
Elevation: 0–2700 m

Distribution

V23 812-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), Ont., Que., Sask., Ala., Ark., Conn., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Mich., Minn., Miss., Mo., Mont., Nebr., N.J., N.Y., N.Dak., Ohio, Okla., S.Dak., Tenn., Utah, Va., Wash., Wis., Wyo.

Discussion

Though widespread, Carex crawei is usually rare or local except near the shores of the Great Lakes, glades in the Interior Highlands, and prairie swales on parts of the Great Plains. Other authors have reported it from Nova Scotia (H. J. Scoggan 1978–1979, part 2; earlier mentioned by M. L. Fernald 1948 on the authority of J. M. Macoun 1899); no specimens to substantiate the reports have been found.

The perigynia in Carex crawei are usually smaller than in C. microdonta. A few specimens from Ontario and New York with all other characteristics of C. crawei have larger and slightly beaked perigynia that approach those of C. microdonta.

Selected References

None.

Lower Taxa

None.
... more about "Carex crawei"
60 +, 59 +  and 38 +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
trigonous +
smaller +
1mm;1.8mm +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
Theodore S. Cochrane +  and Robert F. C. Naczi +
shortened +
rounded +
Granulares +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
m--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
2 cm20 mm <br />0.02 m <br /> (6.7 cm67 mm <br />0.067 m <br />) +
ascending +  and appressed +
scale-like +  and leaflike +
0.6 cm6 mm <br />0.006 m <br /> (9.7 cm97 mm <br />0.097 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex de Crawe +
round +  and trigonous +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, Ont. +, Que. +, Sask. +, Ala. +, Ark. +, Conn. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, S.Dak. +, Tenn. +, Utah +, Va. +, Wash. +, Wis. +  and Wyo. +
0–2700 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry to usually moist, open ground, often aDry to usually moist, open ground, often associated with calcareous gravels or limestone pavements, in wet meadows, fens, prairie swales, beach pools, shores and glades, less commonly edges of white-cedar thickets, prairie patches along rights-of-way, streams, ditches, and quarrieshts-of-way, streams, ditches, and quarries +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
light green +
basal +  and cauline +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
entire;minutely bidentulate +
nearly +  and entire +
7.6 cm76 mm <br />0.076 m <br /> (9.1 cm91 mm <br />0.091 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (7.6 cm76 mm <br />0.076 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
yellowish green +  and pale-brown +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
1.4-2.6 times as long as thick +
ascending +  and spreading +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Fruiting late spring–late summer (May–mid Aug). +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
long-sheathing +  and leaflike +
short-awned +  and acuminate +
0.5 cm5 mm <br />0.005 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.63 cm6.3 mm <br />0.0063 m <br />) +
Amer. J. Sci. Arts, ser. +
adventitious +
staminate +  and pistillate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
basal +  and proximal +
ovate-triangular;ovate +
1.1mm;1.6mm +
cylindric +
Illustrated +  and Endemic +
prophyllate +, pedunculate +  and staminate +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
sessile +  and veined +
rhomboid;broadly ovoid obovoid or subglobose obscurely trigonous +
deciduous +
2-3(-4)-fid +
Carex crawei +
Carex sect. Granulares +
species +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
plant +, not +  and cespitose +
1.8mm +  and 3mm +