Carex atrofusca

Schkuhr
Beschr. Riedgräs. 1: 106, plate Y, fig. 82. 1801.
Common names: Carex brun foncé
Illustrated
Treatment appears in FNA Volume 23. Treatment on page 481. Mentioned on page 477, 479, 482.

Plants loosely cespitose; rhizomes short, slender. Culms to 30(–60) cm. Leaves: blades 2–4 mm wide. Inflorescences 2–6(–8) cm; proximal internode 10–40 mm; peduncle of proximal spikes exserted to 4 cm; proximal bracts with blade 5–22 mm, sheath cylindric, 5–28 mm, mouth usually tinged with dark purple, 0.9–1.4 mm wide Spikes 2–5; lateral spikes usually pistillate, inclined or pendent, 8–19 × 4–7 mm; terminal spike staminate or gynecandrous, erect or inclined, 6–15 × 2–5 mm. Pistillate scales black with pale midvein, ovate or oblong-ovate, 3–4.8 × 0.9–1.6 mm, margins narrow and scarious, apex acute to obtuse, papillose at least on midvein. Staminate scales black with pale midvein, oblong-obovate, 3–5 × 1.2–1.8 mm, margins scarious, apex acute or obtuse. Anthers 1.9–2.6 mm. Perigynia ascending, pale brown proximally, black distally, indistinctly veined, ovate, 3–4.8(–5.5) × 0.9–1.6 mm, papillose at least on margins; beak distinct, 0.3–0.5 mm. Achenes ellipsoid, 1.4–1.6 × 0.7–0.9 mm.


Phenology: Fruiting summer.
Habitat: Sedge meadows, moist shores
Elevation: 10–300 m

Distribution

V23 887-distribution-map.jpg

Greenland, Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Eurasia.

Discussion

Carex atrofusca is the only species in sect. Aulocytsis with papillose perigynia, suggesting that it is perhaps misplaced.

Selected References

None.

Lower Taxa

None.

... more about "Carex atrofusca"
Peter W. Ball +  and Joy Mastrogiuseppe +
Schkuhr +
Carex brun foncé +
Greenland +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and Eurasia. +
10–300 m +
Sedge meadows, moist shores +
Fruiting summer. +
Beschr. Riedgräs. +
Illustrated +
Carex sect. Ferrugineae +
Carex atrofusca +
Carex sect. Aulocystis +
species +