De Corsa Heath. 1. Del. Sta. Rpt. 5:97. 1892.
Grown at one time near Seaford, Delaware.
De Ferrières. 1. Mas Pom. Gen. 12:185. 1883.
Listed but not described.
De Gloria. 1. Lond. Hort. Soc. Cat. 97. 1831.
Listed in this reference.
De Grillet. 1. Mas Pom. Gen. 12:185. 1883.
Listed in this reference.
De Halle. 1. Can. Exp. Farm Bul. 2nd Ser. 3:64. 1900.
A weak grower; planted in Canada.