Amy Smith Muise

Puncturevine (also called goathead), an introduced, invasive plant, is sensitive to competition and will be outcompeted by native species except on repeatedly disturbed areas.

The foliage of this plant is toxic, and grazing animals may eat burs, which cause injuries to the mouth, stomach, and intestines. Ants seem to congregate under the plants, particularly near stem emergence.

The burs are painful to hands or feet of humans and can penetrate shoes or bicycle tires. Clear clothing, shoes, and tires of burs to avoid spreading the plant to new locations.

Stems form a dense mat with small yellow flowers on short stalks. Puncturevine reproduces by seed, so controlling plants prior to seeding is important.

Patrick Alexander

Amy Smith Muise

Patrick Alexander

Patrick Alexander

Patrick Alexander

Patrick Alexander

Amy Smith Muise