Dandya purpusii is a species of flowering plant endemic to northeast Mexico.

It is the only species in the genus Dandya.

[4] In the APG III classification system, it is placed in the asparagus family Asparagaceae, and the cluster lily subfamily Brodiaeoideae (formerly the family Themidaceae).

[5][6] The genus is named in honor of James Edgar Dandy.

This Asparagaceae article is a stub.