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

A perennial with spiny leaves and small, purple, thistle-like flowers. It spreads through extensive root systems. A perennial with heart-shaped leaves and deep purple flowers. Wild violets are often ...

Although typically associated with a lovely pale shade of purple, lavender flowers come in a variety of colors ranging from pure white to deep blue, with plenty of pink and purple shades in between.