Upright cool season annual that grows 2-5 feet tall. Has fibrous roots; hollow, straight stems; and narrow tapered leaves. Winter oat types are the least winter hardy of all the small grains, are not widely available, and require vernalization to head and produce seeds.
Katja Koehler-Cole, Roger Elmore, Charles Shapiro, Humberto Blanco – University of Nebraska
Source link here.