Received for publication July 1, 1978. Approved as journal article number 106-78 of the Ohio Agricultural Research and Development Center.
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The authors are indebted to the Society of American Florists Endowment for their financial support and to Sunnyside Nurseries of Salinas, CA and Paul Ecke Poinsettias of Encinatas, CA for their support. Also, we extend our gratitude to Jeanne Jones, Terry Berger, Dean Taylor, John Kubota and Paul Orson for their efforts.