Thrixspermum, commonly known as hairseeds[2] or 白点兰属 (bai dian lan shu),[3] is a genus of flowering plants in the family Orchidaceae.

Orchids in this genus are epiphytes, lithophytes or terrestrial plants with flat, leathery leaves and short-lived flowers with the sepals and petals more or less similar to each other.

Most species grow in lowland or tropical rainforests up to an altitude of 1,200 m. Orchids in the genus Thrixspermum are epiphytic or lithophytic, rarely terrestrial, monopodial herbs with long thick roots, and flat, fleshy leaves arranged in two ranks with their bases sheathing the stem.

[2][3][4] The genus Thrixspermum was first formally described in 1790 by João de Loureiro in Flora Cochinchinensis.

About fourteen species, two of which are endemic occur in China, nine are found in Taiwan and three in Australia.