This annual produces showy, productive forage ("crimson clover") and has been widely planted across southeastern states (K, W). It often persists or escapes, especially to the south of Mo., Ky. and Va., where ir can behave as a winter annual. T. incarnatum was widely grown in Ky. since trials at the Univ. of Ky. during about 1900 (Gm). It is somewhat persistent and perhaps locally naturalized in several areas, but several colls. mapped here may just come from plantings.