Book  (Sep 1993)  Page(s) 435.  Includes photo(s).
 
Popcorn Miniature. Dr. Denison Morey (USA) 1973. Description... clusters of fluffy white flowers opening from the butter-tinted buds just like pieces of popcorn. Parentage: 'Katherine Zeimet' x 'Diamond Jewel'

Book  (Apr 1993)  Page(s) 462.  
 
Popcorn Miniature, pure white, 1973, 'Katharina Zeimet' x 'Diamond Jewel'; Morey. Description.

Book  (1991)  Page(s) 20, 135.  
 
Page 20: 'Popcorn' is a good choice for a low-growing rose hedge
Page 135: Popcorn It is unique and looks just like a burst of popcorn. There is a sport available, 'Gourmet Popcorn', which looks very similar but is larger.