Cypripedium calceolus var. planipetalum (Fernald) Victorin & J. Rousseau

Cypripedium calceolus var. planipetalum (Fernald) Victorin & J. Rousseau is a synonym sensu FNA Ed. Comm., 2002b of:

Cypripedium parviflorum var. pubescens (Willdenow) Knight, an accepted variety name sensu FNA Ed. Comm., 2002b.