This beautiful plant is a Thailand endemic (only found there) which occurs towards the top of mountains, such as Doi Inthanon and Doi Chiang Dao, in northern Thailand.  The plant was first described in western scientific literature by a German botanist called Dr. Carl Curt Hosseus, who led an expedition to northern Siam, as Thailand was then called, in 1904-1906 (1).  I took these photographs near the top of Doi Inthanon in early February this year (2014).

1) THROUGH KING CHULALONGKORN’S KINGDOM (1904-1906): The First Botanical Exploration of Northern Thailand by Hosseus, Carl Curt.