Henbit has distinctive purple flowers and round, scalloped leaves. It thrives in cool, moist conditions. Blue vervain is a tall, perennial weed with slender spikes of small, blue to purple flowers, ...

Alluring, like sirens, some vicious weeds produce beautiful flowers in calming purple hues. Here are the problematic blossoms ...

Canada thistle, or Cirsium arvense, is one of the most visually striking lawn weeds: It grows sharp barbs and distinctive purple ... grows small and scalloped pink and white flowers and long ...