Erythrorchis, commonly known as bootlace orchids[2] or as 倒吊兰属 (dao diao lan shu),[3] is a genus of two species of climbing, leafless orchids in the family Orchidaceae.

Orchids in the genus Erythrorchis are leafless mycotrophic, climbing herbs that cling to surfaces with small, unbranched roots from the main stems.

The labellum is relatively wide and has crinkled edges and closely surrounds the column.

[2][3][4] The genus Erythrorchis was first formally described in 1837 by Carl Ludwig Blume and published in his book Rumphia.

[5][6] The name Erythrorchis is derived from the Ancient Greek words erythros meaning "red"[7]: 650  and orchis meaning "testicle" or "orchid".