Magazine  (Sep 1977)  Page(s) 23.  
 
"Botanical Descriptions of 40 Saunders Lutea Hybrids" by Dr. David Reath and Silvia Saunders
...These descriptions aim to provide the nurseryman and the average gardener with a means of determining the differences between the hybrids, many of which are very similar indeed...
Wings of the Morning—Single; 10 petals, palest yellow, of heavy substance. Furled back. Flares wide and dark; dramatic. Filaments creamy reddish. Stigmas cream-white, sheath cream-white. Anthers uneven lengths. Foliage of heavy substance.

Article (magazine)  (Jan 1955)  Page(s) 24.  
 
Varieties Raised in America. All by Professor Saunders...
The "Roman Gold Group." Yellow, clear or almost clear , generally single.
'Wings of the Morning,' (1948), formerly Aureole