Cirsium occidentale
From Islapedia
Cirsium occidentale, Western thistle or cobweb thistle is a North American species of thistle which is fairly common across most of California. There are several varieties, which differ from each other in range and form.
Western thistles are found on:
- San Clemente Island
- San Miguel Island
- San Nicolas Island
- Santa Catalina Island
- Santa Cruz Island
- Santa Rosa Island
