Cirsium hydrophilum var. hydrophilum
Common names: Suisun thistle
EndemicConservation concern
Treatment appears in FNA Volume 19. Treatment on page 132.
Heads usually 2.5–3 cm. Cypselae oblong, ca. 5 mm. 2n = 32.
Phenology: Flowering spring–summer (May–Sep).
Habitat: Tidal marshes
Elevation: 0–5 m
Discussion
Of conservation concern.
Suisun thistle is known only from the Suisun Marsh (Solano County) in the Sacramento River delta.
Variety hydrophilum is listed by the U.S. Fish and Wildlife Service as endangered.
Selected References
None.
Lower Taxa
None.
"fine" is not a number."broad" is not a number."broad" is not a number.
... more about "Cirsium hydrophilum var. hydrophilum"
outer +
short-tailed +
introrse +
connate +
serrulate +
spreading +
innermost +
rounded;acute +
scarious +
linear-oblong +
hirsute +
papillate +
angled +
continuous +
winged-petiolate +
withered +
absent +
auriculate-clasping +
appressed +
decurrent +
1/2;2/3 +
pinnatifid;elliptic;broadly oblanceolate +
larger +
leafy +
clustered +
hairy +
barbellate +
many +
coarse +
absent +
stramineous +
narrow +
Suisun thistle +
actinomorphic +
bilateral +
pale rose-purple +
monomorphic +
not ribbed +
glabrous +
oblong +
often spinier +
bractlike +
reduced +
Calif. +
straight +
flexuous +
eglandular +
green +
distinct +
proximal +
25;200 +
bisexual +
dispersed +
many-headed +
singly +
indeterminate +
terminal +
few +
homogamous +
surrounding +
ovoid;campanulate +
bristly-dentate +
alternate +
bristle-tipped +
? (?) +
scarious +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
15 cm150 mm <br />0.15 m <br /> (?) +
tough +
thick +
absent +
connate +
imbricate +
persistent +
distinct +
herbaceous +
many +
weakly to strongly +
connate +
stigmatic +
reduced +
Fl. W. Calif., +
1901 +
absent +
epaleate +
flat;convex +
glutinous +
narrow +
fibrous +
tawny;white +
exalbuminous +
modifed +
6;9 +
subequal +
alternate +
branched +
erect +
2-branched +
ringed +
enlarged +
elongate +
Cirsium hydrophilum var. hydrophilum +
Cirsium hydrophilum +
variety +
cylindric +
expanded +
dentate +
bristly-dentate to coarsely +
non-septate +
fine +
long +
bent +
taprooted +
appressed +
middle +
monocarpic +