Book  (Jan 2000)  Page(s) 237.  
 
Princess Hybrid Tree Peony (Saunders 1941). A single rose hybrid

Magazine  (Sep 1977)  Page(s) 21.  
 
"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...
Princess—Single to semi-double; 12 or more prettily frilled and notched petals, warm lilac-rose with golden tones. Flares small, wine color. Filaments creamy reddish. Stigmas cream-white; sheath cream-white.

Article (magazine)  (Jan 1955)  Page(s) 25.  
 
Varieties Raised in America. All by Professor Saunders...
The "Mystery Group." Ivories, pearled shades, suffused mauves, single to double...
'Princess,' (1941)

Article (magazine)  (Jan 1955)  Page(s) 59.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Lutea hybrid, Magenta, 'Princess' (Saund. 1941), [Gardens [Scott Founfation]

Book  (1944)  Page(s) 104.  
 
For next year 1945
Make a master list of tree peonies to be grafted & check them off as done.
For 1944
...Princess 12664 4+1+1+1 [grafts]

Website/Catalog  (1912)  Page(s) 16.  
 
Choice List of Peonies
Princess — Compact, vigorous habit; color delicate silvery-pink, shaded with lilac and chamois; three nankeen petals tipped with crimson at the center; flne bud.  Largely grown for cut flowers.  Exceedingly fragrant- in fact, the most fragrant of all Peonies; rare and fine.  35 cents each.

Book  Page(s) 5.  
 
Princess 12664 1939 Dark mauve (yellow undertones). Dark onglets. Quite promising. 6 grafts in 8(11). 6 took
4 grafts in 1938 in 8(9) 1 took

Book  Page(s) 75.  
 
L.D. [lutea delavayi] x Rochester mauve
Princess 12664 (1941) Mother plant in 5.d row 1
mauve (yellow undertones). Dark onglets. A great plant. Good size.
1 graft in 8 (9). 1939 6 grafts in 8(11)
1940 5 grafts in 5(6)
1941 1 graft in growth in 8(9) row 1....