Plume Thistle (Cirsium spp.); lateral view of inflorescence, Fern Bluff Park Round Rock Texas
Within the Aster family, several genre of perennial flowering plants are commonly known as thistles. Among these is the genus Cirsium, which contains those most accurately referred to as plume thistles.
The plume thistles are distinguished from other thistle genre by having feathered hairs attached to [...]