Thistles or Cirsium may be best known for their showy purple flowers and pink flowers, in addition to their prickly foliage.

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 ...

unlike the leaves and unlike bull thistle and European marsh thistle pink, white, or lavender-colored flowers with flat bracts and pointed tips that bloom in June seed are fluffy, white tufts of hair ...

Sow thistle is commonly found in crops, gardens and waste areas. As with many members of the Asteraceae family, it starts life as a rosette, and then bolts to form an upright flower stem. Sow thistle ...

It is called a thistle cup because its shape is designed to look like the head of a thistle flower. The base is rounded and the rim turns outwards at the edge, which copies the shape of the flower.

Scotch thistle is commonly found in pastures, and also in orchards, lawns, waste areas and crops. As a vegetative rosette, it can tolerate mowing. However stem elongation ("bolting") occurs when the ...

Current management practices: annually hand pull or dig around rosettes if thistle has bloomed, clip off flowers, buds, and fruiting bodies to prevent seed production mow population before flower buds ...