Buddleja cardenasii is a species endemic only to the region of Cochabamba in Bolivia at an altitude of around 3,000 m. The species was first described and named by Standley in 1935.[1]
Buddleja cardenasii is a dioecious shrub 3 - 4 m high, with branches which are subquadrangular and tomentose. The subcoriaceous leaves are elliptic, lanceolate or ovate, 10 - 12 cm long by 8 cm wide, with a glabrescent and rugose upper surface. The orange inflorescences are paniculate 7 - 25 cm long by 7 - 20 cm wide, comprising cymes each with 6 - 9 flowers; the corollas are 3 - 3.5 mm long.[1]
The species is very similar to B. soratae; further research may well prove them conspecific.[1]
The shrub is not known to be in cultivation.