Received for publication 11 Jan. 1988. Michigan State Agricultural Experiment Station Paper no. 12487. This project was funded in part by grants from the American Floral Endowment and the Fred C. Gloeckner Foundation. Chrysanthemum cuttings were donated by Yoder Brothers, Inc., Barberton, Ohio. 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.