From Tony Avent's fine article on growing ladyslippers ( ...Read Moretarget="_dgnew"rel="nofollow">http://www.plantdelights.com/Article/Cypripedium-Lady-Slippe... ) :
"This 2005 Peter Corkhill hybrid combines the US native Cypripedium parviflorum var. pubescens with the Asian Cypripedium fasciolatum. The resulting vigorous hybrid produces stalks topped with a creamy white pouch backed by light brown sepals. This is a similar cross to Cypripedium 'Inge' except for using the larger flowered form of Cypripedium parviflorum. (Hardiness Zone 4-7)"
From Tony Avent's fine article on growing ladyslippers ( ...Read More