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.

Treatment appears in FNA Volume 23. Treatment on page 331. Mentioned on page 326, 328.
Revision as of 21:09, 16 December 2019 by FNA>Volume Importer

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"
A. A. Reznicek +
Howe in H. C. Gordinier and E. C. Howe +
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 +
Acidic, sandy, peaty hardwood or Chamaecyparis swamps, thickets +
Fruiting late spring–early summer. +
in H. C. Gordinier and E. C. Howe, Fl. Rensselaer County N.Y., +
Carex seorsa +
Carex sect. Stellulatae +
species +