Cirsium edule var. wenatchense

D. J. Keil

Sida 21: 213. 2004.

Common names: Wenatchee thistle
Treatment appears in FNA Volume 19. Treatment on page 147.

Heads mostly borne singly. Peduncles 10–30 cm. Involucres 3–4 × 4–5 cm, moderately arachnoid. Phyllary apices widely spreading, long-acicular, spines 5–15 mm. Corollas 29–33 mm, tubes 9–11 mm, throats 8–12 mm, lobes 9–10 mm; style tips 3–4 mm. Cypselae dark-brown, 4.5–6 mm; pappi 20–25 mm.


Phenology: Flowering summer (Jul–Aug).
Habitat: Stream banks, rocky slopes
Elevation: 600–1200 m

Discussion

Of conservation concern.

Variety wenatchense is known only from the Wenatchee Mountains of central Washington. Little is known of its ecology.

Selected References

None.

Lower Taxa

None.

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

glabrescent +, arachnoid-tomentose +  and villous +
glabrous +  and sparsely villous or shaggy-tomentose +
short-tailed +
spineless +  and twisted +
dentate +, entire +  and spine-tipped +
flexuous +  and straight +
innermost +
scarious +
not differentiated +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
David J. Keil +
D. J. Keil +
sessile +, winged-petiolate +  and spiny +
auriculate-clasping +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
plane;moderately undulate coarsely dentate +
1cm;10cm +
10-nerved or 20-nerved +  and rugose +
tawny +  and white +
? (?) +  and ? (?) +
Wenatchee thistle +
actinomorphic +
2.2 cm22 mm <br />0.022 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
white +  and pink red yellow or purple +
2.9 cm29 mm <br />0.029 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
compressed +  and ovoid +
fertile +  and bisexual +
600–1200 m +
gray-canescent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Stream banks, rocky slopes +
indeterminate +
each +  and sessile +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
narrowly ovoid;hemispheric or campanulate +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not knobbed +, not filiform +, lobed +, spiny-dentate +, linear +  and narrowly broadly triangular +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
entire +  and dentate +
usually lobed +  and dissected +
serrulate +  and entire +
entire +  and spiny-fringed +
2-carpellate +
1.9 cm19 mm <br />0.019 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
persistent +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Flowering summer (Jul–Aug). +
long-acicular +
middle +  and outer +
papillate +  and smooth +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
straight +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
simple +  and openly branched +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Compositae +
Cirsium edule var. wenatchense +
Cirsium edule +
variety +
0.85 cm8.5 mm <br />0.0085 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
cylindric +
expanded +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
bristly-dentate to coarsely +
non-septate +, septate +  and jointed +
slender +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
perennial +  and biennial +
20 cm200 mm <br />0.2 m <br /> (350 cm3,500 mm <br />3.5 m <br />) +
tree +, vine +, shrub +  and subshrub +