Tristerix aphyllus is a holoparasitic plant species of the genus Tristerix[2] in the family Loranthaceae.

T. aphyllus is sometimes called the "cactus mistletoe."

Tristerix aphyllus parasitizes two species of cactus; Echinopsis chiloensis and Eulychnia acida, and in its adult form shows only its flowers and its fruits, bursting forth spectacularly from the columnar cacti which are its hosts.

[3] Mauseth (2011) discusses the morphological/anatomical effects of T. aphyllus on the cactus Echinopsis chiloensis.

Other synonyms are: (sourcesː Govaerts et.al.,[7] International Plant Names Index, 2018)