From the Wyoming Tribune Eagle, we find out where to find blooming cactus in Wyoming.

That would be the Medicine Bow-Routte National Forests and Thunder Basin National Grassland.

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Blue Columbine Holmes Miller/Lady Bird Johnson Wildflower Center
Viewers will be treated to a number of wildflowers such as Indian Paintbrush, Kitten Tails and Simpson’s Ball Cactus.

I wonder what Simpson’s Ball Cactus looks like? From the USDA Forest Service’s Coloring pages for kids, we find it looks something like this:

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Click to enlarge, and then please print out and give to your local children so they can color the cactus, and then you’ll find out what color the flowers are. Or you can click through here to see a picture of one in bloom in Washington. I don’t know if the Washington and Wyoming populations look the same.