Milk thistle (Silybum marianum ... The plant is large – up to six feet tall,' she says. 'It blooms from late spring to early summer with a single pinkish-purple flower per stem.

At first glance, milk thistle in its purest form looks like a tall plant with pretty purple flowers — something you might stick in a vase and put on display in your home. Milk thistle in its ...

Aside from cobwebby thistle, field thistle (Cirsium discolor) and tall thistle (Cirsium altissimum) are commonly found in North America. These native thistle plants are interesting in appearance ...

European marsh thistle frequently invades fens, wetlands, and disturbed sites such as roadside ditches. Identifying features include: typically grows 2-7 feet tall leaves are alternate with deeply ...