Book  (Jan 1999)  Page(s) 322.  
 
Nancy Nicholls Herbaceous Peony. Nicholls (USA) 1941... blush

Website/Catalog  (1960)  Page(s) 3.  
 
White Peonies
Nancy Nicholls (Nicholls 1941) this is our most popular white peony. The flowers are large and near perfection in form. They are fully double with high, full centers. The center of the flowers have a pinkish glow on opening, pure white when fully open. An easy variety to grow and nearly every stem produces a perfect flower. $2.00