Bryobium, commonly known as urchin orchids[3] or 藓兰属 (xian lan shu),[4] is a genus of flowering plants in the family Orchidaceae.

Orchids in this genus are epiphytic or lithophytic plants with large, fleshy pseudobulbs, each with up to three leathery leaves and small, often hairy flowers.

Orchids in the genus are epiphytic or lithophytic herbs with thread-like roots and relatively large, fleshy pseudobulbs that are usually covered by papery bracts when young.

The flowers are usually white, cream-coloured or pinkish, do not open widely and last for up to a few days.

[3][4][5] The genus Bryobium was first formally described in 1836 by John Lindley who published the description in A natural system of botany, or, A systematic view of the organization, natural affinities, and geographical distribution, of the whole vegetable kingdom.