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Thistles


                    Some thistles of the SF Bay Area. Most are exotic invaders, ie, nasty weeds.
Yellow Starthistle, Centaurea solstitialis
Yellow Starthistle, Centaurea solstitialis		 Purple Starthistle, Centaurea calcitrapa
Purple Starthistle, Centaurea calcitrapa		 Bull Thistle, Cirsium vulgare
Bull Thistle, Cirsium vulgare		 California Thistle, Cirsium californicum
California Thistle, Cirsium californicum		 California Thistle, Cirsium californicum
California Thistle, Cirsium californicum		 Milk Thistle, Silybum marianum
Milk Thistle, Silybum marianum
Winged Thistle, Carduus tenuifloris
Winged Thistle, Carduus tenuifloris		 Italian Thistle, Carduus pycnocephalus
Italian Thistle, Carduus pycnocephalus		 Cardoon, Cynara cardunculus
Cardoon, Cynara cardunculus		 Bristly Ox-tongue, Helminthotheca echioides
Bristly Ox-tongue, Helminthotheca echioides		 Smooth Sow Thistle, Sonchus oleraceus
Smooth Sow Thistle, Sonchus oleraceus		 Prickly Sow Thistle, Sonchus asper
Prickly Sow Thistle, Sonchus asper
Fullers Teasel, Dipsacus sativus
Fullers Teasel, Dipsacus sativus

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