collomiae, known by the common name Gila County liveforever, is a subspecies of perennial succulent plant within the genus Dudleya native to central Arizona.

Topping the stem is a rosette of leaves, which may be colored green or covered in a white, powdery epicuticular wax.

[4][5] Prior to proper taxonomic investigation into the genus, many species within Dudleya were variously classified as Cotyledon, Sedum and Echeveria.

The plants currently assigned to this subspecies were first treated taxonomically in 1903 by Nathaniel Lord Britton and Joseph Nelson Rose, who had been working on a revision of Crassulaceae species in North America, which included the creation of the genus Dudleya, named in honor of a Stanford University professor of botany William Russell Dudley.

In 1934, Conrad V. Morton authenticated Rose's description in the Desert Plant Life journal, creating Dudleya collomiae.

[10] It was not until the cytotaxonomic work by Reid V. Moran and Charles H. Uhl finally cemented Dudleya as distinct from Echeveria and other Crassulaceae genera.