Booklet  (1938)  Page(s) 123.  
 
Japanese Peonies (albiflora)
Apple Blossom (Japan-Farr) (30)
Large, Tyrian pink, midseason. Staminodes yellow, with yellow filaments. Carpels smooth, tips cream; disk conspicuous, white. Plant medium size, compact; flowers many and held well above the foliage. A single Apple Blossom is also described.

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  (1915)  Page(s) 42.  
 
Japanese Peonies
Including direct importations from Japan, and Kelway's "Imperial" and Hollis' New Seedling Japanese Peonies
A new race of Peonies of a distinct type, forming a separate class, intermediate between the single and the double types, and distinguished by their stamens being transformed into narrow petaloids. [...]
I have retained the Japanese names, with their translation, prefixed by the Amreicannames, which were given to this set by the Peony Society of the American Florists.
Apple Blossom (Rei-Kai-Zan—Name of a mountain in Japan). Blush-yellow in central filamental petals. $1.

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.