Type: Invasive perennial broadleaf weed. Size: 1 to 5 ft (30 cm to 1,5 m) tall. How to identify: Canada thistle is a spiny plant with slender stems, dark green leaves, and small purple flowers. The ...

This clambering weed with long vines has been known as greater bindweed in the past, and is also incorrectly called convolvulus. It is very commonly found in home gardens, roadsides and waste areas, ...