Cirsium inamoenum var. davisii

(Cronquist) D. J. Keil

Sida 21: 214. 2004.

Common names: Davis’s thistle
Endemic
Basionym: Cirsium davisii Cronquist Leafl. W. Bot. 6: 46. 1950
Treatment appears in FNA Volume 19. Treatment on page 135. Mentioned on page 108.
Revision as of 18:56, 29 July 2020 by imported>Volume Importer
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Involucres 1.5–3.5 cm diam. corollas lavender to rich pink-purple.


Phenology: Flowering summer (Jun–Aug).
Habitat: Arid slopes, roadsides, grasslands, sagebrush scrub, dry woodlands, montane forests
Elevation: 1400–3100 m

Discussion

Variety davisii occurs in the northern Great Basin region and adjacent mountains from northern Nevada and southern Idaho to eastern Wyoming and northern Utah.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."fine" is not a number.

36 +, 34 +  and 32 +
glabrate +  and gray-tomentose +
gray;more or less green +
glabrate +  and tomentose +
short-tailed +
spineless +  and spine-tipped +
spineless +  and twisted +
dentate +, entire +  and spine-tipped +
erect +  and spreading +
innermost +
rounded;acute +
scarious +
not differentiated +
corymbiform +  and open +
indeterminate +  and determinate +
David J. Keil +
(Cronquist) D. J. Keil +
winged-petiolate +
spiny-winged +
decurrent +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Cirsium davisii +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
linear;lance-triangular spinulose +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
10-nerved or 20-nerved +  and rugose +
tawny +  and white +
Davis’s thistle +
actinomorphic +
faintly lavender-tinged +  and bright pink-purple +
1.9 cm19 mm <br />0.019 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
compressed +  and ovoid +
fertile +  and bisexual +
less deeply divided +, unlobed +  and bractlike +
Idaho +, Nev. +, Utah +  and Wyo. +
1400–3100 m +
gray-canescent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Arid slopes, roadsides, grasslands, sagebrush scrub, dry woodlands, montane forests +
indeterminate +
each +  and sessile +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
loosely floccose +  and densely arachnoid +
hemispheric;campanulate +
1.5 cm15 mm <br />0.015 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 +
cauline +  and basal +
bristle-tipped +
deltate +, usually narrowly triangular +  and more or less linear +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
entire +  and dentate +
usually lobed +  and dissected +
ascending +  and spreading +
2-carpellate +
pinnatifid +  and dentate +
persistent +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0 cm0 mm <br />0 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Flowering summer (Jun–Aug). +
middle +  and outer +
papillate +  and smooth +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
ascending +  and abruptly spreading +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
spiny-winged +, simple +  and branched +
gray-tomentose +
1 +  and several +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Compositae +
Cirsium inamoenum var. davisii +
Cirsium inamoenum +
variety +
cylindric +
expanded +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
bristly-dentate to coarsely +
slender +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
perennial +  and biennial +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, vine +, shrub +  and subshrub +