Carex albonigra

Mackenzie in P. A. Rydberg

in P. A. Rydberg, Fl. Rocky Mts., 137, 1060. 1917.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 405. Mentioned on page 403, 404.

Plants densely cespitose. Culms 10–30 cm, distally finely scabrous. Leaves 2.5–5 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes contiguous, overlapping, erect, distinct, short-pendunculate, short-oblong or elongate, 8–20 × 4–7 mm; lateral 1–3 spikes pistillate pedunculate, of similar length; terminal spike gynecandrous. Pistillate scales light to dark-brown with hyaline margins, broadly lanceolate or ovate, equaling perigynia, midvein same color as body, inconspicuous, raised, prominent, short-mucronate. Perigynia ascending, chestnut, veinless, ovate, 3–3.5 × 2–2.5 mm, apex abruptly beaked, papillose; beak 0.3–0.4 mm, entire or shallowly bidentate, smooth. Achenes nearly filling body of perigynia. 2n = 52, 54.


Phenology: Fruiting Jun–Aug.
Habitat: Alpine meadows, fellfields
Elevation: 300–3900 m

Distribution

V23 725-distribution-map.jpg

Alta., B.C., N.W.T., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., N.Mex., Utah, Wash., Wyo.

Discussion

Specimens from California determined as Carex albonigra are provisionally assigned here; these need further study because they differ from the typical Rocky Mountain forms.

Selected References

None.

Lower Taxa

None.
... more about "Carex albonigra"
trigonous +
smaller +
papillose +
David F. Murray +
Mackenzie in P. A. Rydberg +
shortened +
cuneate +  and more or less rounded +
bidentate +  and entire +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-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 +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, N.Mex. +, Utah +, Wash. +  and Wyo. +
300–3900 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Alpine meadows, fellfields +
prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.25 cm2.5 mm <br />0.0025 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 +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 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 +
in P. A. Rydberg, Fl. Rocky Mts., +
black without yellowbrown +  and brown +
adventitious +
light +  and dark-brown +
basal +  and proximal +
ovate;lanceolate +
cylindric +
Illustrated +  and Endemic +
pedunculate +, pistillate +  and short-pendunculate +
overlapping +  and contiguous +
distinct +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
elongate;short-oblong +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
2 +  and 3 +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Atratae +  and Carex sect. Microrhynchae +
Carex albonigra +
Carex sect. Racemosae +
species +
pistillate +  and staminate +
stoloniferous +, rhizomatous +  and long +
plant +  and cespitose +