Carex straminea

Illustrator: Susan A. Reznicek

Copyright: Flora of North America Association

Plants densely cespitose. Culms 35–100 cm. Leaves: sheaths adaxially green-veined nearly to collar, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits U-shaped; distal ligules 1.5–4.5 mm; blades 3–4 per fertile culm, 15–30 cm × 1.5–3 mm. Inflorescences nodding, open, yellow-brown to reddish brown, 3.5–8 cm × 5–14 mm; proximal internode 5–18 mm; 2d internode 5–17 mm; proximal bracts scalelike with bristle tips shorter than inflorescences. Spikes 3–7, distant, distinct, globose, (6–)9–14 × 6–9 mm, base usually attenuate, apex rounded; lateral spikes with staminate portion 2–6 mm at base. Pistillate scales reddish brown, with green or pale midstripe, lanceolate, 2.5–3 mm, shorter or longer and narrower than perigynia, margin reddish brown, apex firm, acuminate or awned to 0.8 mm. Staminate scales with reddish brown margins. Perigynia widely spreading, reddish brown, conspicuously 5-veined or more on each face, ± orbiculate, flat except over achene, 4–5.6 × 1.8–2.8 mm, 0.4–0.5 mm thick, base rounded, margin flat, including wing 0.6–0.9 mm wide; beak widely spreading, pale to reddish brown at tip, flat, ciliate-serrulate, abaxial suture with golden brown margin, distance from beak tip to achene 2–3 mm. Achenes elliptic, 1.5–1.8 × 0.8–1 mm, 0.3–0.4 mm thick. 2n = 74.

Phenology: Fruiting early summer.
Habitat: Freshwater marshes, shores, and swales, wet woods, in sandy or peaty, acidic soils
Elevation: 0–400 m

Distribution

• Generated Map
• Legacy Map

Conn., Del., D.C., Ill., Ind., Ky., Md., Mass., Mich., Mo., N.J., N.Y., N.C., Ohio, Pa., R.I., Va., W.Va., Wis.

Discussion

The distribution of Carex straminea is discontinuous: scattered occurrences or clusters of occurrences are widely separated from each other.

Selected References

None.

Lower Taxa

None.