- "Our" spiniest thistle.
- A biennial, it produces a rosette of leaves the first year, and an upright flowering stalk the second year.
- The "thistledown" , or bristles on the fruits, serve as parachutes to carry the light seeds.
SOURCE: The Audubon Society Field Guide to North American Wildflowers (Eastern Region)
July 23rd, 2011
July 23rd, 2011
August 10th, 2011
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