Cirsium hydrophilum var. vaseyi
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
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
Distribution
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Calif.
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.