Cirsium hydrophilum var. vaseyi

(A. Gray) J. T. Howell

Leafl. W. Bot. 9: 11. 1959.

Common names: Mount Tamalpais or Vasey’s thistle
EndemicConservation concern
Basionym: Cnicus breweri var. vaseyi A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 404. 1884
Synonyms: Cirsium montigenum Petrak Cirsium vaseyi (A. Gray) Jepson
Treatment appears in FNA Volume 19. Treatment on page 133. Mentioned on page 132.

Heads usually 3–3.5 cm. Cypselae oblong or elliptic, 4–5 mm. 2n = 32.


Phenology: Flowering spring–summer (May–Jul).
Habitat: Spring-fed marshy meadows on serpentine parent material in areas of chaparral and mixed evergreen forest
Elevation: 300–500 m

Discussion

Of conservation concern.

Variety vaseyi is endemic to the slopes of Mt. Tamalpais in the southern North Coast Range of Marin County, California.

Selected References

None.

Lower Taxa

None.

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

glabrate +  and gray-tomentose +
glabrescent +  and arachnoid-tomentose +
short-tailed +
spineless +  and twisted +
innermost +
scarious +
corymbiform +, paniculiform +, subcapitate +, spiciform +  and racemiform +
indeterminate +  and determinate +
David J. Keil +
(A. Gray) J. T. Howell +
winged-petiolate +
auriculate-clasping +
decurrent +
Cnicus breweri var. vaseyi +
compound +  and simple +
pinnatifid;elliptic;broadly oblanceolate +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
10-nerved or 20-nerved +  and rugose +
tawny +  and white +
stramineous +
Mount Tamalpais or Vasey’s thistle +
actinomorphic +
pale rose-purple +
1.8 cm18 mm <br />0.018 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
dark-brown +  and black +
elliptic +  and oblong +
fertile +  and bisexual +
300–500 m +
gray-canescent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Spring-fed marshy meadows on serpentine parent material in areas of chaparral and mixed evergreen forest +
paniculiform +  and open +
indeterminate +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
each +  and sessile +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
glabrate +  and arachnoid +
ovoid;campanulate +
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 +
dentate +, lobed +  and few +
0.2 cm2 mm <br />0.002 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
entire +  and dentate +
usually lobed +  and dissected +
2-carpellate +
persistent +
15 cm150 mm <br />0.15 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering spring–summer (May–Jul). +
middle +  and outer +
weakly to strongly +
papillate +  and smooth +
Leafl. W. Bot. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
glutinous +
tawny;white +
setiform +  and plumose +
exalbuminous +
subequal +
Endemic +  and Conservation concern +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1 +  and several +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Cirsium montigenum +  and Cirsium vaseyi +
Cirsium hydrophilum var. vaseyi +
Cirsium hydrophilum +
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 /> (1 cm10 mm <br />0.01 m <br />) +
perennial +  and biennial +
100 cm1,000 mm <br />1 m <br /> (220 cm2,200 mm <br />2.2 m <br />) +
tree +, vine +, shrub +  and subshrub +