Orchidaceae

Phaius tonkinensis (Aver.) Aver.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Lithophytic herb to 1.5 m tall on shady rocks in humid wet valley between limestone hills. Tepals white, later yellow, lip dull yellowish with pale reddish spots. Locally common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1659.