Cirsium eatonii var. eriocephalum

(A. Gray) D. J. Keil

Sida 21: 1645. 2005.

Common names: Mountain or alpine thistle
Endemic
Basionym: Cnicus eriocephalus A. Gray Proc. Amer. Acad. Arts 10: 46. 1874,
Synonyms: Carduus hookerianus var. eriocephalus (A. Gray) A. Nelson Cirsium scopulorum (Greene) Cockerell ex Daniels
Treatment appears in FNA Volume 19. Treatment on page 152. Mentioned on page 128, 151.

Stems erect or ascending, 30–150 cm. Leaf faces thinly to densely arachnoid-tomentose, especially abaxially, and villous or tomentose with septate trichomes, especially along midveins, adaxially ± glabrate. Heads sessile or short-pedunculate in usually nodding, densely woolly-tomentose, spiciform or racemiform arrays. Involucres 2.5–3.5 cm, densely tomentose with septate trichomes (individual phyllaries obscured by tomentum). Phyllaries: outer with stiff lateral spines; apical spines slender. Corollas yellow (northern populations) or pink to pale-purple (southern populations), 13–18 mm, tubes 6–9 mm, throats 3–5.5 mm, lobes 3–7 mm. Pappi 10–15 mm. 2n = 34 (as C. scopulorum).


Phenology: Flowering summer (Jul–Sep).
Habitat: Forest openings, alpine and subalpine meadows, windswept alpine ridges
Elevation: 2200–3800 m

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

villous +  and glabrous +
villous +, glabrous +  and arachnoid-tomentose +
short-tailed +
spineless +  and twisted +
dentate +, entire +  and spine-tipped +
usually stiffly ascending +  and spreading +
innermost +
scarious +
not differentiated +
racemiform +  and spiciform +
indeterminate +  and determinate +
woolly-tomentose +
David J. Keil +
(A. Gray) D. J. Keil +
sessile +, winged-petiolate +  and spiny +
decurrent +
Cnicus eriocephalus +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
1cm;5cm +
10-nerved or 20-nerved +  and rugose +
spiny-fringed +
tawny +  and white +
? (?) +  and ? (?) +
Mountain or alpine thistle +
actinomorphic +
pink +  and pale-purple +
1.3 cm13 mm <br />0.013 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
compressed +  and ovoid +
fertile +  and bisexual +
Colo. +, N.Mex. +  and Utah. +
2200–3800 m +
gray-canescent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Forest openings, alpine and subalpine meadows, windswept alpine ridges +
short-pedunculate +  and sessile +
indeterminate +
nodding +  and erect +
each +  and sessile +
suffused with dark purple +  and green +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
broadly ovoid;campanulate +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
sessile +  and petiolate +
glabrate +, tomentose +, villous +  and arachnoid-tomentose +
cauline +  and basal +
bristle-tipped +
deltate +, usually narrowly triangular +  and more or less linear +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
3-lobed +, lance-oblong +  and broadly triangular +
2-carpellate +
persistent +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 cm0 mm <br />0 m <br /> (14 cm140 mm <br />0.14 m <br />) +
Flowering summer (Jul–Sep). +
spine-tipped +  and plane +
middle +  and outer +
papillate +  and smooth +
sessile +  and winged-petiolate +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
0.7 cm7 mm <br />0.007 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
branched +, simple +  and sparingly branched +
ascending +  and erect +
1 +  and several +
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Carduus hookerianus var. eriocephalus +  and Cirsium scopulorum +
Cirsium eatonii var. eriocephalum +
Cirsium eatonii +
variety +
cylindric +
expanded +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
bristly-dentate to coarsely +
arachnoid-tomentose +
slender +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
tree +, vine +, shrub +  and subshrub +