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Cirsium horridulum

Family: asteraceae
Common name(s): Yellow Thistle
Hardiness ratings: USDA zone 5~7 - 10

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Cirsium horridulum

• Carolina Nature - Photos of this native plant, often with notes on habitat and identification. (2 photos)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 7-10) (13 photos)
• Garden.org - Community-assembled plant profile (35 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (35 photos)
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 5-10) (14 photos)

Cirsium horridulum var. horridulum

Common name(s): Yellow Thistle
Hardiness ratings: USDA zone 5 - 10

Links

• Alabama Plants - Description and photographs of botanical features, with notes about habitat and native status. (3 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (3 photos)
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 5-10) (3 photos)