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Wildflowers of Texas, Plant Resources Center, University of Texas at Austin

Bull Thistle   Cirsium horridulum    
Sunflower family — Asteraceae

Also known as:
Yellow Thistle, Horrid Thistle, Spiny Thistle

Slides: (click for larger view)


Bull thistle's large prickly leaves and huge flower heads make it stand out among all the other plants in the sandy pastures in which it typically occurs. Flower color varies from white to deep pink.

Dried Specimens: (click for larger view)


Flowering Months: March, April, May, June

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