Received for publication August 13, 1982. Florida Agricultural Experiment Station Journal Series No. 4060. The authors gratefully acknowledge donation of plant material from Fernco-Seville Cooperation, Seville, Fla. and partial funding for conduct of this research from SAFE Endowment. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.