Cirsium fontinale var. campylon

(H. Sharsmith) Pilz ex D. J. Keil & C. E. Turner

Phytologia 73: 313. 1992.

Common names: Mt. Hamilton thistle
EndemicConservation concern
Basionym: Cirsium campylon H. Sharsmith Madroño 5: 85, fig. 1. 1939
Treatment appears in FNA Volume 19. Treatment on page 162. Mentioned on page 161.
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Basal leaves: longer spines 4–15 mm, distal faces equally glandular and tomentose. Cauline leaves: longer spines 10–18 mm. Distalmost stem bracts typically separated from heads. Phyllaries 65–85, 25–35 of them reflexed; apical spines 3–6 mm; marginal spines usually absent. Cypselae 3.4–4.1 mm. 2n = 34.


Phenology: Flowering spring–summer (Apr–Aug).
Habitat: Serpentine seeps in areas of chaparral, valley grasslands, foothill woodlands
Elevation: 300–800 m

Discussion

Of conservation concern.

Variety campylon is endemic to the Mt. Hamilton Range in Alameda, Santa Clara, and Stanislaus counties.

Selected References

None.

Lower Taxa

None.
David J. Keil +
(H. Sharsmith) Pilz ex D. J. Keil & C. E. Turner +
Cirsium campylon +
Mt. Hamilton thistle +
300–800 m +
Serpentine seeps in areas of chaparral, valley grasslands, foothill woodlands +
Flowering spring–summer (Apr–Aug). +
Endemic +  and Conservation concern +
Asteraceae tribe Cynarea +
Cirsium fontinale var. campylon +
Cirsium fontinale +
variety +