Carex atrosquama

Mackenzie

Proc. Biol. Soc. Wash. 25: 51. 1912.

IllustratedEndemic
Synonyms: Carex apoda Clokey Carex atrata subsp. atrosquama (Mackenzie) Hultén Carex atrata var. atrosquama (Mackenzie) Cronquist
Treatment appears in FNA Volume 23. Treatment on page 405. Mentioned on page 403, 404.

Plants loosely cespitose. Culms 20–50 cm, distally scabrous. Leaves 3–5 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes contiguous or the proximal separate, overlapping, erect, distinct, short-pendunculate, short-oblong or elongate, 8–20 × 5–6 mm; lateral 2–3 (–5) spikes pistillate, of similar length; terminal spike gynecandrous. Pistillate scales dark-brown or black to margins, ovate or broadly lanceolate, shorter than and as broad as perigynia, midvein same color as body, inconspicuous, occasionally raised, prominent, short-mucronate. Perigynia ascending, pale green becoming golden brown, veinless, elliptic, 2.5–3.5 × 1.5–1.75 mm, apex gradually or abruptly beaked, distally papillose; beak 0.3–0.5 mm, entire or shallowly bidentate, smooth. Achenes nearly filling body of perigynia.


Phenology: Fruiting Jun–Aug.
Habitat: Subalpine and alpine meadows, river gravels, shorelines
Elevation: 300–3600 m

Distribution

V23 726-distribution-map.jpg

Alta., B.C., N.W.T., Yukon, Alaska, Colo., Idaho, Mont., Oreg., Utah, Wash.

Discussion

The absence of collections of Carex atrosquama in Wyoming is unexpected.

Selected References

None.

Lower Taxa

None.
... more about "Carex atrosquama"
trigonous +
smaller +
papillose +
David F. Murray +
Mackenzie +
shortened +
cuneate +  and more or less rounded +
bidentate +  and entire +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
papillose +  and smooth +
red +  and purple +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Colo. +, Idaho +, Mont. +, Oreg. +, Utah +  and Wash. +
300–3600 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Subalpine and alpine meadows, river gravels, shorelines +
prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
inconspicuous +
prominent +  and raised +
short-mucronate +
with (1-)3-6(-30) bristles and/or scales +
pale green becoming golden brown +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.175 cm1.75 mm <br />0.00175 m <br />) +
Fruiting Jun–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like;,;thread-like +
ladder-fibrillose +  and veined +
purple +, tinged red +  and dotted +
short-pendunculate +
overlapping +  and separate +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Proc. Biol. Soc. Wash. +
black without yellowbrown +  and brown +
adventitious +
black +  and dark-brown +
basal +  and proximal +
lanceolate;ovate +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
2 +  and 3 +
papillate +
deciduous +
2-3(-4)-fid +
Carex apoda +, Carex atrata subsp. atrosquama +  and Carex atrata var. atrosquama +
Carex atrosquama +
Carex sect. Racemosae +
species +
pistillate +  and staminate +
stoloniferous +, rhizomatous +  and long +
plant +  and cespitose +