As classified in WFO snapshot
June 2023
Warning: older classification
variety
Cypripedium calceolus var. viridiflorum
M.Schulze
This variety name was first published in Mitth. Thüring. Bot. Vereins , n.f., 17: 39 (1902)
This variety name has been reclassified since this snapshot. Its current preferred usage is a synonym .