Book  (1928)  Page(s) 248.  
 
Tree Peony Check List
† Apollo. (Kelway, 1889.)

† Never widely distributed.

Website/Catalog  (1890)  Page(s) 31.  
 
Tree or Moutan Pæonies (Pæonia Arborea). (Kelway's.)
7/6 each.
Apollo, white, shaded yellow.