Ladenbergia muzonensis, synonyms including Ladenbergia ulei, is a species of plant in the family Rubiaceae.

It is native to north-western South America: Colombia, Ecuador, Peru and Venezuela.

[1] Ladenbergia ulei was assessed as "vulnerable" in the 1998 IUCN Red List, where it is said to be native only to Peru.

[2] As of February 2023[update], L. ulei was regarded as a synonym of Ladenbergia muzonensis, which has a wider distribution.

This Rubiaceae article is a stub.