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 oblongovate, 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.

"wide" is not a number.

... more about "Carex atrofusca"
0.14 cm1.4 mm <br />0.0014 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
ellipsoid +
smaller +
0.7mm;0.9mm +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
hispidulous +, setose +  and glabrous +
papillose +
Peter W. Ball +  and Joy Mastrogiuseppe +
Schkuhr +
shortened +
tapered +  and rounded +
straight +
distinct +
bidentate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
v--shaped +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 2.2 cm22 mm <br />0.022 m <br /> (?) +
2mm;4mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex brun foncé +
round +  and trigonous +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
Greenland +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and Eurasia +
10–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Sedge meadows, moist shores +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
pendent +  and inclined +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
tinged with dark purple +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
black +  and pale-brown +
0.3 cm3 mm <br />0.003 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
scale-like +  and filiform +
Beschr. Riedgräs. +
adventitious +
staminate +  and pistillate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
basal +  and proximal +
oblong-obovate;oblongovate;ovate +
1.2mm;1.8mm +
cylindric +
0.5 cm5 mm <br />0.005 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
Illustrated +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Ferrugineae +
Carex atrofusca +
Carex sect. Aulocystis +
species +
inclined +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
stoloniferous +  and rhizomatous +
plant +  and cespitose +