Carex rossii

Boott in W. J. Hooker

in W. J. Hooker, Fl. Bor.-Amer. 2: 222. 1839.

IllustratedEndemic
Synonyms: Carex deflexa var. farwellii Britton Carex deflexa var. media L. H. Bailey Carex deflexa var. rossii (Boott) L. H. Bailey Carex farwellii Carex novae-angliae var. rossii (Boott) L. H. Bailey
Treatment appears in FNA Volume 23. Treatment on page 536. Mentioned on page 532, 533, 537, 548.

Plants densely cespitose; rhizomes usually ascending, occasionally horizontally spreading, dark reddish-brown to purplish brown, 0–10 mm, stout. Culms ascending, 7–30 (–40) cm, weakly to strongly scabrous distally; bases (remnants of old leaves) slightly fibrous. Leaf-blades pale to dark green, usually equaling or exceeding stems, occasionally shorter, 0.8–2.5 (–4) mm wide, herbaceous, glabrous abaxially, strongly scabrous to papillose adaxially. Inflorescences with both staminate and pistillate spikes; peduncles of basal pistillate spikes erect, elongate, slender; peduncles of staminate spikes 1.1–10 mm; proximal nonbasal bracts leaflike, exceeding inflorescences. Spikes: proximal pistillate spikes 2–4 (basal spikes 1–2); cauline spikes overlapping or somewhat separated, with 3–10 (–15) perigynia; staminate spikes (4.8–) 6–12.8 × (0.7–) 0.9–1.3 (–2.5) mm. Scales: pistillate scales pale to dark reddish-brown, with narrow white margins, ovate, 2.9–5.7 × 1.4–2.3 mm, shorter than perigynia, apex acute or acuminate to long-acuminate; staminate scales lanceolate, 3.2–5.8 × 1.2–1.8 mm, apex acuminate. Anthers 1.2–2 mm. Perigynia green to pale-brown, veinless, ellipsoid to obovoid, 3.1–4.5 × 1.4–1.7 mm; beak straight or slightly bent, pale green, occasionally with reddish-brown tinge, 0.9–1.7 mm, ciliate-serrulate, apical teeth 0.2–0.4 mm. Stigmas 3. Achenes brown, globose to obovoid or ellipsoid, obtusely trigonous in cross-section, 1.9–2.4 × 1.3–1.7 mm. 2n = 36.


Phenology: Fruiting mid Apr–early Sep.
Habitat: Moist or dry, sandy or rocky, open montane pine, fir, and spruce woodlands, sagebrush slopes, deciduous wooded slopes, prairies, alpine meadows
Elevation: 210–3700 m

Distribution

V23 1006-distribution-map.jpg

Alta., B.C., Man., N.W.T., Ont., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mich., Minn., Mont., Nebr., Nev., N.Mex., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Carex rossii"
0.19 cm1.9 mm <br />0.0019 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
trigonous;globose;obovoid or ellipsoid +
1.3mm;1.7mm +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
beaked +, awned +  and cuspidate +
glabrous +  and pubescent +
reddish-brown tinge +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
William J. Crins +  and Jeff H. Rettig +
Boott in W. J. Hooker +
shortened +
rounded +  and tapering +
straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
v--shaped +
2mm;4.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
separated +  and overlapping +
brown +  and red +
round +  and trigonous +
7 cm70 mm <br />0.07 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
210–3700 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist or dry, sandy or rocky, open montane pine, fir, and spruce woodlands, sagebrush slopes, deciduous wooded slopes, prairies, alpine meadows +
prophyllate +, pedunculate +, staminate +, , +  and pistillate +
pale +  and dark green +
strongly scabrous;papillose +
exceeding stems +  and equaling +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
green +  and pale-brown +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
Fruiting mid Apr–early Sep. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like +  and filiform +
in W. J. Hooker, Fl. Bor.-Amer. +
dark reddish-brown +  and purplish brown +
spreading +  and ascending +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
adventitious +
staminate +  and pistillate +
pale +  and dark reddish-brown +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
basal +  and proximal +
lanceolate;ovate +
1.2mm;1.8mm +
cylindric +
Illustrated +  and Endemic +
staminate +  and pistillate +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.28 cm12.8 mm <br />0.0128 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex deflexa var. farwellii +, Carex deflexa var. media +, Carex deflexa var. rossii +, Carex farwellii +  and Carex novae-angliae var. rossii +
Carex rossii +
Carex sect. Acrocystis +
species +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
stoloniferous +  and rhizomatous +
plant +  and cespitose +