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Family: asteraceae
Common name(s): Cobweb Thistle
Hardiness ratings: USDA zone 7 - 10 
General resources
Links for Cirsium occidentale
- Annie's Annuals - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 7-10)
 (2 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments.
- Garden.org - Community-assembled plant profile (3 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (2 photos)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 7-10) (2 photos)
- Turner Photographics - Profile of wildflower of the US Pacific Northwest, with botanical description, habitat and distribution, and photo gallery.
Common name(s): California Thistle
Synonym(s): Cirsium californicum
Hardiness ratings: USDA zone 6 - 10
Links
- Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 6-10) (1 photo)
Links
Links
Common name(s): Red Thistle, Venus Thistle
Hardiness ratings: USDA zone 7 - 10
Links
- Garden.org - Community-assembled plant profile (1 photo)
- Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 7-10) (9 photos)
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