Thistle was an old-school Crayola color from 1949 that lasted nearly long enough to witness the millennium. In 1999, Crayola retired Thistle and replaced it with Indigo. Individually, Thistle is ...

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 ...

Bull thistle, a member of the Asteraceae family, is yet another herbaceous biennial on our list of invasives. Unfortunately, bull thistle can flourish in an array of sites ranging from meadows, ...