Cirsium douglasii var. douglasii

Endemic
Treatment appears in FNA Volume 19. Treatment on page 133.

Plants to 150 cm. Cauline leaves usually deeply lobed, spines usually 7–20 mm. Heads mostly 2.5–3.5 cm. 2n = 34.


Phenology: Flowering summer (Jun–Aug).
Habitat: Springs, seeps, streamsides, coastal bluffs, coniferous and hardwood forests, often on serpentine
Elevation: 10–1200 m

Discussion

Variety douglasii grows in the Coast Ranges from Humboldt to Monterey and San Benito counties.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

short-tailed +
spineless +  and twisted +
dentate +, entire +  and spine-tipped +
erect +  and spreading +
innermost +
scarious +
not differentiated +
paniculiform +
indeterminate +  and determinate +
David J. Keil +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
auriculate-clasping +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (60 cm600 mm <br />0.6 m <br />) +
unlobed or;shallowly deeply pinnatifid +
2cm;15cm +
10-nerved or 20-nerved +  and rugose +
ascending;spreading +
tawny +  and white +
actinomorphic +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
dark-brown +  and black +
compressed +  and ovoid +
fertile +  and bisexual +
10–1200 m +
glabrate +  and gray-tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Springs, seeps, streamsides, coastal bluffs, coniferous and hardwood forests, often on serpentine +
indeterminate +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
each +  and sessile +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
glabrate +  and arachnoid +
ovoid;hemispheric +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
bristle-tipped +
ascending;spreading +
lobed +, dentate +, lanceolate +  and ovate-triangular +
0.2 cm2 mm <br />0.002 m <br /> (3 cm30 mm <br />0.03 m <br />) +
entire +  and dentate +
usually lobed +  and dissected +
2-carpellate +
persistent +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dark purple +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering summer (Jun–Aug). +
middle +  and outer +
weakly to strongly +
papillate +  and smooth +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
linear to elliptic +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
spiny-winged +, simple +  and branched +
ascending +  and erect +
1 +  and several +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Compositae +
Cirsium douglasii var. douglasii +
Cirsium douglasii +
variety +
cylindric +
expanded +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
bristly-dentate to coarsely +
slender +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
perennial +, short-lived +  and biennial +
60 cm600 mm <br />0.6 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +