Prince, William–(1766-1842)–Flushing, New York–(Linnaean Botanic Garden and Nursery)–was the third proprietor of the Prince Nurseries.  He continued the work of his father in introducing foreign trees and plants, and the creation of new varieties from seed.  The Lombardy poplar was imported by this nursery.  The catalogs from 1815 to 1850 were ranked as among the standard horticultural publications of the U. S.  William was one of the founders of the New York Horticultural Society (1818).  He died on April 9, 1842.
Sources:  Plants; Bailey; CHSJ-Apr. 1966; Art Gar; Hedrick