Cirsium edule var. macounii

(Greene) D. J. Keil

Sida 21: 213. 2004.

Common names: Macoun’s thistle
Endemic
Basionym: Carduus macounii Greene Ottawa Naturalist 16: 38. 1902
Synonyms: Cirsium macounii (Greene) Petrak
Treatment appears in FNA Volume 19. Treatment on page 147.

Heads often densely crowded at stem tips. Peduncles 0–5 (–10) cm. Involucres 2–4 × 2.5–4 cm, usually densely arachnoid. Phyllary apices widely spreading, long-acicular, spines 5–15 mm. Corollas (15–) 18–22 mm, tubes 7–11 mm, throats (4–) 5–8.5 mm, lobes (2–) 4.5–7 mm; style tips 4–5 mm. Cypselae dark-brown, 5–6.5 mm; pappi 20–25 mm. 2n = 34 (as C. edule).


Phenology: Flowering Jun–Oct.
Habitat: Damp soil, mostly montane meadows, forests, alpine
Elevation: 0–1900 m

Distribution

V19-134-distribution-map.gif

B.C., Alaska, Oreg., Wash.

Discussion

Variety macounii ranges from the coastal mountains of southeastern Alaska and British Columbia to Vancouver Island, the Olympic Peninsula, and northern Cascades of Washington, and the mountains of northwestern Oregon.

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 +
(Greene) D. J. Keil +
sessile +, winged-petiolate +  and spiny +
auriculate-clasping +
decurrent +
Carduus macounii +
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 ? (?) +
Macoun’s thistle +
actinomorphic +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
white +  and pink red yellow or purple +
1.8 cm18 mm <br />0.018 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
compressed +  and ovoid +
fertile +  and bisexual +
B.C. +, Alaska +, Oreg. +  and Wash. +
0–1900 m +
gray-canescent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Damp soil, mostly montane meadows, forests, alpine +
indeterminate +
each +  and sessile +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
narrowly ovoid;hemispheric or campanulate +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 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 /> (10 cm100 mm <br />0.1 m <br />) +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering Jun–Oct. +
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 />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Cirsium macounii +
Cirsium edule var. macounii +
Cirsium edule +
variety +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cylindric +
expanded +
0.5 cm5 mm <br />0.005 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
bristly-dentate to coarsely +
non-septate +, septate +  and jointed +
slender +
0.7 cm7 mm <br />0.007 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 +