Genotypic differences among forms of Lupinus nanus were established for the reproductive traits of flowering time, flower size, pollen production, ovule production, length of anthers, length of stigmatic hairs, coherence between keel margins, blue reflectance from corollas, honey guide marking, and autofertility These forms outcrossed at significantly different rates when exposed to the same pollination environment. Attempts are made to relate reproductive traits to reproductive mode.