Cinchona barbacoensis H. Karst.

High-resolution scans of representative museum specimens for reference are available (along with technical taxonomic information) at TROPICOS: Cinchona barbacoensis.

This species is found in the Pacific slopes and coastal region of western Colombia and northwestern Ecuador, in the Chocó biogeographic region, at 0-1800 m.

This species is unusual in Cinchona in its slender, shrubby or more often clambering or lianescent habit, its leaves that are usually sharply acute, and its occurrence from sea level to 1500 m elevation or occasionally a bit higher. Cinchona barbacoensis can be recognized within this genus by its calyx limb that is only very shallowly lobed, up to 1/4 of its length; the slender, often climbing habit; and its relatively long slender capsules and long narrow seeds.