Carex saximontana

Mackenzie

Bull. Torrey Bot. Club 33: 439. 1906.

Common names: Rocky Mountain sedge
IllustratedEndemic
Synonyms: Carex backii var. saximontana (Mackenzie) B. Boivin Carex backii var. subrostrata (Bates) Dorn Carex durifolia var. subrostrata Bates
Treatment appears in FNA Volume 23. Treatment on page 562. Mentioned on page 558, 560.

Culms 2.5–34 cm. Leaves: basal sheaths pale to medium brown; blades dark green to greenish glaucous, 1.9–4.9 mm wide, longer than stems, coriaceous, margins white-hyaline, smooth or scabrous. Lateral spikes 0–2, basal, on erect peduncles. Terminal spikes with staminate portion 2–3-flowered, 1.6–3.4 × 0.5–1.6 mm; pistillate portion 2–6-flowered. Pistillate scales green; proximal scales with margins 2.4–4.6 mm wide, essentially concealing perigynia, apex acute; distal scales lanceolate to ovate, apex awned to acute. Staminate scales green or white, ovate to oblong, 1.5–3 × 1–1.6 mm, margins connate near base or for entire length, enfolding scales above, white or with brown subapical band, apex obtuse. Anthers 1–1.5 mm. Perigynia pale green, obovoid, 3.2–4.9 × 1.6–2.5 mm, tightly enveloping achenes, apex abruptly tapered, papillose on distal 1/3; beak 0.6–1.2 mm, scabrous. Stigmas clavate, erect, short, thick, minutely papillose. Achenes pale to dark-brown, obpyriform, 2.5–3 × 1.6–2.4 mm. 2n = 64.


Phenology: Fruiting spring–summer (late May–mid Jul).
Habitat: Moist to dry, open prairies, pine, and deciduous woodlands, on ridges and slopes
Elevation: 200–2100 m

Distribution

V23 1070-distribution-map.jpg

Man., Ont., Sask., Colo., Minn., Mont., Nebr., N.Dak., S.Dak., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Carex saximontana"
pale +  and dark-brown +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
obpyriform +
1.6mm;2.4mm +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
papillose +
William J. Crins +, Robert F. C. Naczi +, A. A. Reznicek +  and Bruce A. Ford +
Mackenzie +
shortened +
pale;medium brown +
tapering +
flattened-triangular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
dark green +  and greenish +
v--shaped +
1.9mm;4.9mm +
smaller +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Rocky Mountain sedge +
2 +  and widest +
round +  and trigonous +
2.5 cm25 mm <br />0.025 m <br /> (34 cm340 mm <br />0.34 m <br />) +
lanceolate +  and ovate +
Man. +, Ont. +, Sask. +, Colo. +, Minn. +, Mont. +, Nebr. +, N.Dak. +, S.Dak. +  and Wyo. +
200–2100 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist to dry, open prairies, pine, and deciduous woodlands, on ridges and slopes +
septate-nodulose +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
stipitate +  and 2-veined +
with brown subapical band +, white +  and white-hyaline +
lanceolate;oblong-lanceolate rounded-trigonous +
2.4mm +  and 4.6mm +
with (1-)3-6(-30) bristles and/or scales +
veined +  and veinless +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Fruiting spring–summer (late May–mid Jul). +
2-3(-4)-carpellate +
2-6-flowered +, pistillate +, 2-3-flowered +  and staminate +
3 (?) +  and 1 (?) +
Bull. Torrey Bot. Club +
adventitious +
staminate +  and pistillate +
white +  and green +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
basal +  and proximal +
ovate;oblong +
1mm;1.6mm +
septate-nodulose +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillose +
deciduous +
dilated +
Carex backii var. saximontana +, Carex backii var. subrostrata +  and Carex durifolia var. subrostrata +
Carex saximontana +
Carex sect. Phyllostachyae +
species +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
plant +  and cespitose +