Of the several bulbous tillandsia speceis, T. seleriana is more widespread and variable than others. It is often called an ant plant. Myrmecophytes (ant plants) are species that provide shelter for the ants that colonize their bulbous shape and can also add some nutritional benefit to the plant. Don't be surprised if you find that ants have invaded your T. seleriana.
Horticulturalist & Explorer Specializing in the Genus Tillandsia.