Vailia is a monotypic genus of flowering plants belonging to the family Apocynaceae.

It just contains one species, Vailia mucronata Rusby[1][2] It is native to Bolivia, Ecuador and Peru.

[2] The genus name of Vailia is in honour of Anna Murray Vail (1863–1955), an American botanist and first librarian of the New York Botanical Garden.

[3] The Latin specific epithet of mucronata means sharp-edged, from mucro, sword-point or edge.

[4] Both the genus and the species were first described and published in Bull.