Based on E. viridis sensu Vargas, Bol. There is great variation in dimensions and general appearance of flowers of this species, but the variation in most characters appears to be continuous, leading to the conclusion that a series of widely separated populations represent conspicuous variants of a single polymorphic species. Perhaps most conspicuous is corolla size and width in relation to calyx length. Such a flower was illustrated as the type of Eccremocarpus longiflorus . In other cases, such as the flower illustrated as the type of E. viridis , the corolla is relatively broader, hardly or not exserted from the calyx.
Stamens are subequal in length.
In this specimen, the corolla is narrowest below the middle. In other collections, the corolla is narrowest above, near, or below the middle, and in some collections, it is evenly cylindrical, either straight or curved, for its entire length. The material underlying E. lobbianus and the original illustration of E. viridis may represent young flowers and not the dimensions and shapes of flowers when they are fully unfolded. Thus, if Eccremocarpus viridis were to be divided into two or more species, it is not clear what the separated elements should be called. This species is found in Colombia, Ecuador, and Peru mainly between 2700 and 3600 m elevation.