Book  (Jan 2000)  Page(s) 183.  
 
Guidon Herbaceous Peony. Nicholls 1941. A double pink lactiflora

Website/Catalog  (1960)  Page(s) 7.  
 
Dark Pink Peonies
Guidon (Nicholls 1941) The flowers are double, somewhat flat but extremely large—one of the largest in our garden. The color is deep lilac pink. The bush is of medium height and the stems are strong enough to hold the large flowers well erect in all kinds of weather. Late mid-season. One of our best garden varieties. $1.50