Bulbophyllum japonicum (Makino) Makino

Family: Orchidaceae
Japanese: ミヤマムギラン (深山麦蘭) [Miyama Mugi Ran]

A lovely mountain orchid with small, bulbous leaves that often grows on tree trunks and boulders. Looks similar to and has similar growing habits as B. inconspicuum, but the leaves are a bit stumpier and the flowers have a bit more character.

References:
Pfahl, J. Internet Orchid Species Photo Encyclopedia. Referenced September 4, 2016 from http://www.orchidspecies.com/cirrjaponicum.htm
米倉浩司・梶田忠 (2003-)　「BG Plants 和名－学名インデックス」（YList），http://ylist.info（ 2019年8月14日）