About Megadenia pygmaea Maxim.
Megadenia is a genus of flowering plants in the family Brassicaceae. This genus contains only one species, Megadenia pygmaea Maxim. Megadenia pygmaea is an annual plant native to subalpine regions of western and central China, Tibet, and the southern Russian Far East (Primorsky Krai). It is thought to be extinct in Buryatia.