Website/Catalog  (1956)  Page(s) [2].  
 
Japanese Tree Peonies
Ubatama (Brilliant Black King) Very large maroon...$8.00

Website/Catalog  (1945)  Page(s) [3].  
 
Rare Plants Tree Peonies
Ready for Your Garden Now.
Red
Tyrant of Black Flame (Ubatama).

Magazine  (Sep 1944)  Page(s) 50.  
 
Tree Peony Supplement to the Manual
John C. Wister, Germantown, Pa.
Alphabetical Check List of Tree Peony Names, August 1944
Japanese Moutan type; Crimson; UBA-TAMA (Pitch Black) (Brilliant Black King) (Japan, before 1896) Chugai Shokobutsu Yen Nursery, near Kobe, Japan, 1929-40; Oberlin in 1943 renamed Mahogany.
Name in Large Caps in Black Type indicates accepted names of varieties in American commerce 1944.

Website/Catalog  (1941)  Page(s) [3].  
 
Tree Peonies
Ubatama (Brilliant Black KIng). Very large; double; incurved satiny carmine petals shaded black. Distinct color among Tree Peonies. Outstanding...$20 00

Website/Catalog  (1940)  Page(s) 9.  
 
Japanese Tree Peonies
(English translation in parentheses)
101. Ubatama. (Brilliant black king). Satiny carmine shaded black. Incurved petals. Distinct color amongst Tree Peonies. Very large; double flowers; outstanding...$20.00