Tristerix is a genus of mistletoe in the family Loranthaceae, native to the Andes, ranging from Colombia and Ecuador to Chile and Argentina.

[2][3] They are woody perennials usually occurring as aerial parasites, are pollinated by hummingbirds and flowerpiercers, with seed-dispersal generally by birds but occasionally by mammals (Dromiciops).

[3] The genus is distinguished from other New World Loranthaceae by its simple, terminal, racemose inflorescences, together with its of 4- or 5-merous flowers, versatile anthers, and the presence of endosperm.

[3] A simplified consensus cladogram of their conclusions, from analyses which used two different character sets and three methods (maximum likelihood, minimum parsimony, and Bayesian inference) for finding the tree, is given below.

T. longebracteatus T. grandiflorus T. peytonii T. pubescens T. peruvianus T. chodatianus T. verticillatus T. penduliflorus T. aphyllus T. corymbosus See [2][3][7][8]