Carex nigromarginata

Schweinitz

Ann. Lyceum Nat. Hist. New York 1: 68. 1824.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 542. Mentioned on page 534, 541, 543.

Plants densely cespitose; rhizomes ascending to erect, reddish-brown, 0–10 mm, stout. Culms 8–27 cm, scabrous distally; bases (remnants of old leaves) strongly fibrous. Leaf-blades green, greatly exceeding culms, 1.4–4 mm wide, herbaceous, papillose to scabrous abaxially, papillose to scabrous adaxially. Inflorescences with both staminate and pistillate spikes; peduncles of staminate spikes 0.3–0.8 mm; proximal cauline bracts leaflike, usually shorter than inflorescences. Spikes: proximal pistillate spikes 2–3 (basal spikes 0); cauline spikes overlapping, proximal 2 separated by less than 7 mm, with 6–15 perigynia; staminate spikes 5.3–10 × 1.1–2.3 mm. Scales: pistillate scales pale to, usually, dark reddish-brown to purplish brown, with similarly colored or narrow white margins, ovate to lanceolate, 2.9–3.7 × 1.2–2 mm, equaling or exceeding perigynia, apex acute to acuminate or cuspidate; staminate scales ovate, 3–4.3 × 1–1.8 mm, apex obtuse to acute or acuminate. Anthers 1.4–2.6 mm. Perigynia pale green, veinless, ellipsoid, 2.8–3.6 × 1–1.3 mm, longer than wide; beak straight, pale green, 0.7–1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.4 mm. Stigmas 3. Achenes brown, ellipsoid, obtusely trigonous in cross-section, 1.4–2 × 0.9–1.2 mm. 2n = 36.


Phenology: Fruiting early Apr–late Jun.
Habitat: Acidic soils of rocky, dry woods, thickets, and clearings, in partial shade of mixed hardwood-pine forests or full sun along open roadsides and clearing edges, often adjacent to streams
Elevation: 10–800 m

Distribution

V23 1023-distribution-map.jpg

Ont., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Ky., Mass., Miss., Mo., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Carex nigromarginata"
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
trigonous;ellipsoid +
0.9mm;1.2mm +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
beaked +, awned +  and cuspidate +
glabrous +  and pubescent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
William J. Crins +  and Jeff H. Rettig +
Schweinitz +
shortened +
rounded +  and tapering +
ciliate-serrulate +
straight +
bidentate +  and bent +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
v--shaped +
2mm;4.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
brown +  and red +
round +  and trigonous +
8 cm80 mm <br />0.08 m <br /> (27 cm270 mm <br />0.27 m <br />) +
Ont. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ind. +, Ky. +, Mass. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Va. +  and W.Va. +
10–800 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Acidic soils of rocky, dry woods, thickets, and clearings, in partial shade of mixed hardwood-pine forests or full sun along open roadsides and clearing edges, often adjacent to streams +
prophyllate +, pedunculate +, staminate +, , +  and pistillate +
papillose;scabrous abaxially +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white +, narrow +  and colored +
with (1-)3-6(-30) bristles and/or scales +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
Fruiting early Apr–late Jun. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like +  and filiform +
Ann. Lyceum Nat. Hist. New York +
reddish-brown +
ascending +  and erect +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
adventitious +
staminate +  and pistillate +
dark reddish-brown +  and purplish brown +
0.3 cm3 mm <br />0.003 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
basal +  and proximal +
ovate;ovate;lanceolate +
exceeding perigynia +  and equaling +
1mm;1.8mm +
cylindric +
Illustrated +  and Endemic +
staminate +  and pistillate +
0.53 cm5.3 mm <br />0.0053 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Montanae +
Carex nigromarginata +
Carex sect. Acrocystis +
species +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
stoloniferous +  and rhizomatous +
plant +  and cespitose +