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Notes
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This species is characterized by its rather slender habit; its rather small leaves that do not have domatia; its distinctive stipules that are ovate and apiculate or shortly bidentate, and when older become dry and scarious and fall off as a whole or sometimes fall in several pieces; its subsessile to shortly pedunculate, terminal, capitate inflorescences with several flowers; its unusual tubular calyx limb that is 1-2 mm long and truncate to undulate with the top portion becoming reflexed or sometimes circumscissile and deciduous; its small white corollas; and its rather small, subglobose, red fruits with the pyrenes abaxially (i.e., dorsally) generally smooth. This species is difficult to identify using Bremekamp's (1963) key because Bremekamp did not know the mature color of the fruits but hypothesized that they were blue, and included Psychotria betamponensis in a group with blue-fruited Psychotria species and keyed it based in part on that hypothesized incorrect character. Based on the collections seen, this species appears to be rather widespread but not common in any particular area.
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