Carex jamesii

Schweinitz

Ann. Lyceum Nat. Hist. New York 1: 67. 1824.

Common names: James’s sedge grass sedge
IllustratedEndemic
Synonyms: Carex steudelii Kunth
Treatment appears in FNA Volume 23. Treatment on page 561. Mentioned on page 388, 452, 559, 560.

Culms 4–37 cm; cataphylls with concave cells. Leaves: basal sheaths golden brown to dark-brown; blades green, eceeding culms, 0.8–4.8 mm wide, herbaceous, margins green, scabrous. Lateral spikes 1–5, basal, on spreading to nodding peduncles. Terminal spikes with staminate portion 3–13flowered, (4.2–) 5.814.5 × 0.40.8 mm; pistillate portion 14-flowered. Pistillate scales green, margins connate, hyaline, white, occasionally tinged reddish-brown; proximal scales with margins 1.4–3 mm, apex long-acuminate; distal scales with margins 0.4–0.8 mm wide, apex acuminate, awnless. Staminate scales ovate, 1.1–1.8 (–2.1) × 1.2–1.5 mm, 0.12–0.25 (–0.75) length of staminate portion of terminal spike, margins hyaline, white, often with reddish-brown subapical band, apex truncate or broadly obtuse. Anthers 0.6–1.6 mm. Perigynia green to bronze, globose to ellipsoid, 4.4–7.2 × 1.9–2.4 mm, tightly enveloping achenes, apex abruptly tapering; beak 1.6–3.8 mm, scabrous. Stigmas filiform, flexuous, strongly papillose. Achenes dark-brown, globose to ellipsoid, 2–2.6 × 1.7–2.4 mm. 2n = 66, 70.


Phenology: Fruiting spring–summer (early May–mid Jul).
Habitat: Mesic, rich ravines, slopes, and flood plains in hardwood forests, on lime-rich substrates
Elevation: 100–400 m

Distribution

V23 1067-distribution-map.jpg

Ont., Ala., Ark., Ill., Ind., Iowa, Kans., Ky., Md., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

"lengthofstaminateportion" is not declared as a valid unit of measurement for this property.".5mm" is not declared as a valid unit of measurement for this property.".8" is not declared as a valid unit of measurement for this property.

... more about "Carex jamesii"
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
globose;ellipsoid +
1.7mm;2.4mm +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
William J. Crins +, Robert F. C. Naczi +, A. A. Reznicek +  and Bruce A. Ford +
Schweinitz +
shortened +
golden brown;dark-brown +
tapering +
flattened-triangular +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
v--shaped +
0.8mm;4.8mm +
smaller +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
concave +
James’s sedge +  and grass sedge +
2 +  and widest +
round +  and trigonous +
4 cm40 mm <br />0.04 m <br /> (37 cm370 mm <br />0.37 m <br />) +
Ont. +, Ala. +, Ark. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, W.Va. +  and Wis. +
100–400 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Mesic, rich ravines, slopes, and flood plains in hardwood forests, on lime-rich substrates +
septate-nodulose +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
stipitate +  and 2-veined +
white +, hyaline +, tinged reddish-brown +  and green +
lanceolate;oblong-lanceolate rounded-trigonous +
0.4mm +  and 0.8mm +
with (1-)3-6(-30) bristles and/or scales +
veined +  and veinless +
green +  and bronze +
0.44 cm4.4 mm <br />0.0044 m <br /> (0.72 cm7.2 mm <br />0.0072 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Fruiting spring–summer (early May–mid Jul). +
2-3(-4)-carpellate +
14-flowered +, pistillate +  and staminate +
3 (?) +  and 1 (?) +
Ann. Lyceum Nat. Hist. New York +
adventitious +
staminate +  and pistillate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
basal +  and proximal +
1.2mm;1.5mm +
septate-nodulose +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillose +
filiform +
deciduous +
dilated +
Carex steudelii +
Carex jamesii +
Carex sect. Phyllostachyae +
species +
plant +  and cespitose +