and tall thistle (Cirsium altissimum) are commonly found in North America. These native thistle plants are interesting in appearance and can add a lot of character to a yard that wouldn't be there ...

The Sacramento Mountains thistle is a rare purple flower than can grow to be six feet tall and lives only in wet, high-elevation habitats in the Sacramento Mountains near the town of Cloudcroft, New ...

is an invasive plant that prefers moist soils. European marsh thistle frequently invades fens, wetlands, and disturbed sites such as roadside ditches. Identifying features include: typically grows 2-7 ...

As sow thistle can grow up to 1 m tall, it can be quite a competitive weed ... The lobes in each leaf of prickly sow thistle do not tend to cut in so close to the midrib of the plant as in sow thistle ...