Article (magazine)  (2001)  
 
Paeonia delavayi Franch....
KEY TO VARIETIES
1. Shrub more than 1 m tall (usually up to c. 1.8 m):...... 1. var. delavayi
1. Shrub or subshrub up to not more than 1 m tall:..... 2. var. angustiloba
2. var. angustiloba Rehder & Wilson in Sarg., Pl. Wilson. 1: 318 (1913)...

KEY TO FORMAS
2. Petals white:.... 2c. var. angustiloba f. alba

2c. var. angustiloba f. alba (Bean) S. G. Haw, stat. nov. Typus: t. 49 in Stern, Stud. Gen. Paeonia (1946) (holotype). Syn. P. delavayi var. alba Bean, Trees and Shrubs 3:265 (1933); P. potaninii f. alba (Bean) Stern, Stud. Gen. Paeonia 49 (1946).
This name is applied to white-flowered, low-growing plants of the species, which Sir Frederick Stern (1946: 49) called P. potaninii f. alba.

Book  (Jan 1999)  Page(s) 20.  
 
Paeonia potaninii 'Alba' a white-flowered form [of P. potaninii]

Article (magazine)  (Jan 1955)  Page(s) 12.  
 
P. delavayi Franchet.....The following names of so-called varieties appear in the literature but have no authentic standing:
alba-a creamy white, now referred to P. potanini forma alba-which see. 

Article (magazine)  (Jan 1955)  Page(s) 14.  
 
Paeonia potanini forma alba F. C. Stern, A Study of the Genus Paeonia, 1946.
Syn. P. delavayi variety alba Bean, 1933.
This form has white flowers.

Article (magazine)  (Jan 1955)  Page(s) 22.  
 
Meanwhile, a white form was named P. delavayi alba by Bean in 1933, only to be changed to P. potanini alba by Stern in 1943.