Cremastra parentage map

Visualize the frequency with which all Cremastra orchids are used in creating new hybrids.
Cremastra is a genus of flowering plants from the orchid family, Orchidaceae. It contains 4 currently recognized species, native to China, Japan, Korea, Thailand, the Himalayas, and the Russian Far East.
Visualize the frequency with which all Cremastra orchids are used in creating new hybrids.