Theodore W. TibbittsDepartment of Horticulture, University of Wisconsin, Madison, WI 53706
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Research Assistant. Present address: Plant Sciences Dept., Univ. of Arizona, Tucson, AZ 85721.
Received for publication 15 Oct. 1983. Research supported by the College of Agricultural and Life Sciences, Univ. of Wisconsin, Madison, and the Wisconsin Power and Light Company. The contents do not necessarily reflect the views or policies of the Dept. of Horticulture, Univ. of Wisconsin, or Wisconsin Power and Light Company. The authors thank Morrison Brothers Seed Company for donation of seed. 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.