Article (magazine)  (Jan 1955)  Page(s) 59.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Japanese, Scarlet, 'Osho-kun' (Magnificent Chinese Prince) (Jap. bef. 1926), [Nurseries] Oberlin Peony gardens

Website/Catalog  (1940)  Page(s) 8.  
 
Japanese Tree Peonies
(English translation in parentheses)
85. Ohshokun. (Proper name of an old Chinese beauty). Scarlet; lighter at the tips of petals; double...$8.00

Book  (1928)  Page(s) 262.  
 
Tree Peony Check List
*Osho-Kun. (Japan, 1926.) Henry & Lee 1926.

*Presumed to be in commerce, 1927.