Bromus diandrus is a species of grass known by the common names great brome and "ripgut brome". This plant is native to the Mediterranean but has been introduced to much of the rest of the world.
This brome grass is native to the Mediterranean but has been introduced to much of the rest of the world. It does best in areas with a Mediterranean climate, such as California and parts of southern Australia, but it is quite tolerant of many climates. Ripgut brome is a winter annual that grows throughout winter and spring and matures in the summer. The adult plant is one to three feet in height with hairy, rough leaves about a centimeter wide. They are very sharp and very rough due to tiny barb-like hairs that face backwards, allowing the seed to catch and lodge like a fish hook. This characteristic makes the seeds a danger to animals, which can easily get a seed lodged in a paw or eye. Motion can cause the seed to work itself deeply into flesh. This is one of several grass species known to pet owners as "foxtails", a backyard hazard for outdoor cats and dogs.