Synonyma: Cypripedium calceolus var. rubrum, Cypripedium macranthos, Cypripedium macranthos f. albiflorum, Cypripedium macranthos f. rebunense, Cypripedium macranthos var. albiflorum, Cypripedium macranthos var. atropurpureum, Cypripedium macranthos var. flavum, Cypripedium macranthos var. maximum, Cypripedium macranthos var. speciosum, Cypripedium…