Photo Credit: Steve Dewey, Utah State University, retrieved from Bugwood.org (Image Number: 1459334), use under CC BY 3.0 US, modified from the original
Medusahead is a grass species native to the Mediterranean region of Europe. It was likely introduced to North America by accident and was first recorded in Oregon in 1887.
Medusahead out-competes native species and forms dense populations. It forms a dense layer of litter that prevents germination of seeds from other species.
This grass grows 25-50 cm tall and has very distinctive flowering spikes. They are 1-5 cm long and have very long awns that are up to 10 cm long.
The spikes stay green longer than most of the other grasses. The awns become twisted when they dry, giving the grass its name.
Medusahead grows in dry and open areas and can be found together with downy brome.