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Notes:
This species is characterized by its generally slender habit with rather small elliptic leaves that have quite short petioles and domatia; its short, bilobed, hirtellous stipules; its rather short, congested cymose to subcapitate inflorescences; its small flowers with yellow corollas, and its small fruits that apparently become black at maturity. This species is not well characterized, and probably includes a heterogeneous group of plants in Bremekamp's circumscription; he included plants from variously an apparently humid habitat in the Manongarivo Massif in northern Madagscar, dry tsingy in western Madagascar, and humid forest in Analamazoatra in east-central Madagascar. Similar to his cirumscription plants are included here based on the diagnostic characters Bremekamp used to separate this species, but this will eventually need re-evaluation. Psychotria leilae is similar to Psychotria subcapitata, which has leaves without domatia and generally with rather bluntly angled apices, vs. sharp and weakly acuminate in Psychotria leilae.
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