Article (magazine)  (Jan 1955)  Page(s) 13.  
 
So-called varieties of P. lutea that have been offered by nurserymen include....
splendens Listed by Barr 1938. Flowers dark yellow, probably latest of all to flower. It seems likely that any ambitious nurseryman could give similar Latin names to almost any seedling.

Article (magazine)  (Jan 1955)  Page(s) 58.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
lutea splendens, [Gardens] Scott Foundation, See under species