Puncturevine

Puncturevine is a sprawling annual plant that forms a dense mat with very sharp, spiny seed heads. 

Puncturevine is a painful pest invading Hood River.

This is a sprawling annual plant that forms a dense mat with very sharp, spiny seed heads. Also known as goathead, puncturevine has branched stems that can spread up to 6-feet wide, stemming from a single crown. Flowers are small, yellow and have five petals. The leaves are hairy, 1-3 inches long, and divided into leaflets, each about 1/4 inch long. The seed head is woody with very sharp spines. Seeds are easily spread by sticking into footwear, vehicle tires and animals.