Book  (1928)  Page(s) 57, 62.  
 
Check List of Japanese Peonies
Apple Blossom (Rei-kai-zan). (Origin unknown.) 7.7 (Sym. 1925). Flesh-pink.
Rei-kai-zan. See Apple Blossom.

Website/Catalog  (1914)  Page(s) 8.  
 
Paeonia Albiflora
12 Rei-kei-zan, Semi-double, soft flesh with yellow center.

Book  (1907)  Page(s) 38.  
 
315. BLOSSOM, APPLE; P.
(1) 1894, American Florist p. 1112.

Website/Catalog  (1898)  Page(s) 12.  
 
Paeonia Officinalis. (Herbaceous Peonies.)
A rich Japanese flower, perennial, flowering in middle of summer.
19. Reikai-zan. Blush, yellow in central filamentous petals.