Using the Rosette Fast Plant to Investigate Theories on the Optimal Timing of the Transition from Vegetative to Reproductive Growth in Annual Plants Mark A. Schlessman, Vassar College  Contact Information:  Mark A. Schlessman  Professor of Biology  Box 187, Vassar College  124 Raymond Ave.  Poughkeepsie, NY 12604-0187  Phone: 914-437-7417  Students in [Dr. Schlessman's] laboratory have used rapid-cycling Brassica rapa in two ongoing projects. One involves experimental tests of theories on the optimal timing of the transition from vegetative to reproductive growth in annual plants. [They] are using the rosette mutant to compare fecundities of plants that begin flowering at different times. [The] second project is a study of the siring abilities of various mutant stocks of Rcb's that are available for teaching.