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Cirsium hydrophilum var. hydrophilum
(Greene) Jeps.
Family:
Asteraceae
Suisun thistle
Images
not available
FNA
Resources
David J. Keil in Flora of North America (vol. 19, 20 and 21)
Heads
usually 2.5-3 cm.
Cypselae
oblong, ca. 5 mm.
2
n
= 32.
Flowering spring-summer (May-Sep). Tidal marshes; of conservation concern; 0-5 m; Calif.
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.
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