Website/Catalog  (1956)  Page(s) [2].  
 
Japanese Tree Peonies
Suisho Haku (Clear crystal white) Fine crystal white semi-double...$8.00

Magazine  (Sep 1944)  Page(s) 48.  
 
Tree Peony Supplement to the Manual
John C. Wister, Germantown, Pa.
Alphabetical Check List of Tree Peony Names, August 1944
Japanese Moutan type; Rose Red; † SUISHO-HAKU (Crystal Palace) (Clear Crustal White) (Japan, before 1919) Yokohama Nurseries, Yokohama, Japan, 1919; Chugai Shokobutsu Yen Nursery, near Kobe, Japan, 1929-40; K. Wada, Hokomya Nurseries, Numazu-shi, Japan, 1937-39.

Name in Large Caps—not in Black Type—indicates accepted names of varieties not in American commerce 1944, but either grown in this country (prefix *) or in Japanese commerce 1935-40.
† Not grown in America 1944, but in Japanese commerce (offered in Japanese catalogues btwn 1935 & 1940).

Book  (1928)  Page(s) 267.  
 
Tree Peony Check List
*Suisho-haki. (Japan, 1919.) Yokohama 1919.

The varieties marked (*) are believed to be in commerce or in existence at the present time.

Book  (1907)  Page(s) 201.  
 
2336. SINSHOHAKU; P. moutan.
(1) 1903, Jap. Cat. Fewkes' MSS.