Like the unstable phylogenetic position, Selenipedium also has
a very interesting morphology. This genus has fragrant and crustose seeds like Vanilla, but has the same chromosome number (2n = 20) [131], valvate sepal aestivation, and leaf vernation and texture as Cypripedium (Fig. 2), and even shares some anatomical features with Cypripedium irapeanum and C. californicum.