Curlycup Gumweed, Badlands National Park, South Dakota, August 23, 2007
Grindelia squarrosa (From Wikipedia, the free encyclopedia)
Grindelia squarrosa, also known as a curly-top gumweed or curlycup gumweed, is a small North American biennial or short-lived perennial plant.
It is native to western and central North America, from British Columbia east to Québec and New England, and south as far as California, Arizona, Chihuahua, and Texas