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Notes
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This species is apparently rare, as noted by Andersson (1998) who reported seeing only two collections. Andersson noted in his key that this species is quite similar to Cinchona pubescens in its leaves without foveolate domatia and hirtellous to hirsute hairs found generally throughout on the upper surface; however it can be separated from that species by its narrower leaves of rather stiffer texture and its shorter seeds, 4-5.7 mm long, vs. broad leaves with a thinly papery texture and seeds 7-8.5 mm long in C. pubescens. Andersson noted that this species can be recognized by its leaves with trichomes that are often relatively long, up to 1.6 mm long, and "basally cushioned" by enlarged epidermal cells, with these "cushions" persistent even after the trichomes fall off. He also noted that these plants may represent a hybrid rather than a species, but recognized them as a species because they did not match any other plants. The corollas of C. asperifolia still have not been documented, which complicates evaluation of its status and relationships.
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