Rock Creek Hot Springs
Mount Whitney Trail
One of three species of thistles in a mountain meadow.
This was at least as good a butterfly nectar resource as the large patch of showy milkweed that it surrounded.
Cirsium is a genus of perennial and biennial flowering plants in the Asteraceae, one of several genera known commonly as thistles. They are more accurately known as Plume thistles. These differ from other thistle genera (Carduus, Silybum and Onopordum) in having feathered hairs to their achenes. The other genera have a pappus of simple unbranched hair.