Carex seorsa

Howe in H. C. Gordinier and E. C. Howe

in H. C. Gordinier and E. C. Howe, Fl. Rensselaer County N.Y., 39. 1894.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 331. Mentioned on page 326, 328.

Culms 15–75 cm. Leaves 2–4 per culm; sheaths with inner band hyaline, 3.5–12 cm, apex deeply concave, glabrous; ligules 1.7–7 mm, apex acute or often emarginate; blades plicate to flat, 9–50 cm × 0.8–3.9 mm, widest leaf 2.1–3.9 mm wide. Inflorescences 1.8–7 cm; spikes 4–8; lateral spikes pistillate often with few staminate flowers proximally, 2.8–10.8 mm, sessile, staminate portion (0–) 1–6-flowered, (0–) 0.8–4.6 mm, pistillate portion 4–25-flowered, 2–7.6 mm; basal 2 spikes 5–27 mm apart; terminal spike gynecadrous, 4.7–16.5 mm, staminate portion 3–13-flowered, 1.8–12.7 × 0.9–2.1 mm, pistillate portion 6–23-flowered, 2.8–7.3 × 4.4–6 mm. Pistillate scales ovate, 1.2–2.2 × 1–1.6 mm, apex acute. Staminate scales ovate, 1.7–3.3 × 1–1.4 mm, apex acute. Anthers 1–1.9 mm. Perigynia spreading to reflexed, green, 6–14-veined abaxially, 0–6-veined adaxially over achene, elliptic to elliptic-ovate, 1.8–2.9 × 1–1.9 mm, 1.2–2.1 times as long as wide; beak 0.2–0.6 mm, 0.09–0.33 length of body, smooth. Achenes ovate to orbiculate, 1.2–1.6 × 0.85–1.4 mm.


Phenology: Fruiting late spring–early summer.
Habitat: Acidic, sandy, peaty hardwood or Chamaecyparis swamps, thickets
Elevation: 0–300 m

Distribution

V23 591-distribution-map.jpg

Ont., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ind., Ky., Md., Mass., Mich., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Va.

Discussion

Carex seorsa very rarely hybridizes with C. atlantica subsp. atlantica.

Carex seorsa is unusual in sect. Stellulatae in its primarily forest understory habitat, lax, spreading habit, perigynia widest in the middle, and smooth perigynia beaks. Its affinities require further study.

Selected References

None.

Lower Taxa

None.
... more about "Carex seorsa"
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
ovate;orbiculate +
much smaller +
0.85mm;1.4mm +
0.1 cm1 mm <br />0.001 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
A. A. Reznicek +
Howe in H. C. Gordinier and E. C. Howe +
shortened +
white-hyaline +, hyaline +  and narrow +
rounded +  and cordate +
0.09 length of body;0.33 length of body +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
9 cm90 mm <br />0.09 m <br /> (50 cm500 mm <br />0.5 m <br />) +
inconspicuous +
plicate +  and flat +
0.8mm;3.9mm +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
0.8mm +  and 5mm +
round +  and trigonous +
15 cm150 mm <br />0.15 m <br /> (75 cm750 mm <br />0.75 m <br />) +
Ont. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ind. +, Ky. +, Md. +, Mass. +, Mich. +, Miss. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +  and Va. +
0–300 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Acidic, sandy, peaty hardwood or Chamaecyparis swamps, thickets +
1.8 cm18 mm <br />0.018 m <br /> (7 cm70 mm <br />0.07 m <br />) +
sessile +  and pistillate +
0.28 cm2.8 mm <br />0.0028 m <br /> (1.08 cm10.8 mm <br />0.0108 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0-6-veined +  and 6-14-veined +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
spreading +  and reflexed +
0.1 cm1 mm <br />0.001 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
6-23-flowered +, pistillate +, 3-13-flowered +, staminate +, 4-25-flowered +  and (0-)1-6-flowered +
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.73 cm7.3 mm <br />0.0073 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.76 cm7.6 mm <br />0.0076 m <br />) +
0.44 cm4.4 mm <br />0.0044 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
3 (?) +  and 1 (?) +
in H. C. Gordinier and E. C. Howe, Fl. Rensselaer County N.Y., +
adventitious +
staminate +  and pistillate +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
basal +  and proximal +
ovate;ovate +
1mm;1.4mm +
cylindric +
3.5 cm35 mm <br />0.035 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Illustrated +  and Endemic +
0.5 cm5 mm <br />0.005 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex seorsa +
Carex sect. Stellulatae +
species +
0.47 cm4.7 mm <br />0.0047 m <br /> (1.65 cm16.5 mm <br />0.0165 m <br />) +
plant +  and cespitose +
2.1mm +  and 3.9mm +