Lupinus pilosus Murr varies in seed coat coloration, and white color was found to be transmitted as a monogenic recessive Using this trait as a genetic marker, we traced outcrossing in a wild population in Israel and in several experimental breeding entities derived from it The rate of outcrossing varied between 30% and over 60% in different environments In the absence of pollinators, the average seed set was two or three seeds per pod, whether or not hand tripping of flowers was practiced The estimates indicate that L pilosus is versatile in its mating system and can attain higher rates of outcrossing than those reported for other Old World lupines