-Plants (Kingdom Plantae)

-Vascular Plants (Phylum Tracheophyta)

-Flowering Plants (Subphylum Angiospermae)

-Dicots (Class Magnoliopsida)

-Gentians, Dogbanes, Madders, and Allies (Order Gentianales)

-Dogbane Family (Family Apocynaceae)

-Milkweeds (Subfamily Asclepiadoideae)

-Tribe Asclepiadeae

-Subtribe Gonolobinae

-Genus Gonolobus

Gonolobus niger is a twining, herbaceous to semi-woody vine in the milkweed family (Apocynaceae). Native to parts of Mesoamerica, including Mexico, this species typically grows in tropical dry forests, forest edges, and disturbed habitats, where it climbs over shrubs and low trees using its flexible stems.