Cypripedioideae is one of five subfamilies of Orchidaceae and contains five genera and about 120 species.
Mexipedium, Phragmipedium and Selenipedium are found in Europe and Central and South America.
They have a flower with a lipor shoe-shaped pocket forcing the insects to pass by rudimentary stamens so that pollen is transported and deposited on the pistil.
All the flowers of this subfamily have two fertile stamens, a shield-shaped staminode and a lip-shaped purse.
Probably Central America.
All Cypripedioideae are terrestrial orchids that grow in temperate regions as well as subtropical and tropical.
The name is derived from the Greek cypris (Venus) and podilon (shoes).