Carex nelsonii

Mackenzie in P. A. Rydberg

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

IllustratedEndemic
Synonyms: Carex estesiana Kelso
Treatment appears in FNA Volume 23. Treatment on page 412. Mentioned on page 402, 410.

Plants densely cespitose. Culms 15–30 cm, distally finely scabrous. Leaves 3–4 mm wide. Inflorescences: proximal bracts usually shorter than or, occasionally, equaling inflorescences; spikes contiguous, overlapping, forming dense terminal cluster or proximal spike sometimes distinct and separate, sessile or short-pedunculate, short-oblong, 10–12 × 5–8 mm; lateral 2–3 spikes pistillate; terminal spike gynecandrous. Pistillate scales blue-black to margins, lanceolate, shorter than, less frequently as long as, and as broad as perigynia, midvein same color as body, inconspicuous or lighter colored and conspicuous, apex acute. Perigynia ascending, yellow green, golden brown or if dark-brown with yellow margins, veinless, narrowly elliptic, 3.5–4 × 1.5–1.75 mm, apex gradually beaked, distally papillose; beak 0.8–1 mm, bidentate, occasionally serrulate. Achenes filling proximal 1/2 or less of perigynia.


Phenology: Fruiting Jul–Aug.
Habitat: Moist alpine meadows, rocky slopes
Elevation: 2900–3900 m

Discussion

Carex nelsonii appears to be similar to the Asian C. oligantha Steudel.

Selected References

None.

Lower Taxa

None.
... more about "Carex nelsonii"
trigonous +
smaller +
papillose +
David F. Murray +
Mackenzie in P. A. Rydberg +
shortened +
cuneate +  and more or less rounded +
bidentate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 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 +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Colo. +, Mont. +, Utah +  and Wyo. +
2900–3900 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist alpine meadows, rocky slopes +
prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lighter colored +
conspicuous +  and inconspicuous +
with (1-)3-6(-30) bristles and/or scales +
dark-brown +, golden brown +  and yellow green +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.175 cm1.75 mm <br />0.00175 m <br />) +
Fruiting Jul–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 +
basal +  and proximal +
lanceolate +
cylindric +
Illustrated +  and Endemic +
pistillate +, short-pedunculate +  and sessile +
separate +, overlapping +  and contiguous +
distinct +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
short-oblong +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
2 +  and 3 +
papillate +
deciduous +
2-3(-4)-fid +
Carex estesiana +
Carex nelsonii +
Carex sect. Racemosae +
species +
pistillate +  and staminate +
stoloniferous +, rhizomatous +  and long +
plant +  and cespitose +