P. Phillipson, June 2012: Specimens identified as this sp from Tsaratanana are doubtful, they are excluded pending re-examination. Otherwise only known from the type, material from around Moramanga and Ankerana.

C.M. Taylor, Oct. 2013: This species as provisionally circumscribed here is characterized by its rather robust, glabrous habit; its stems that rapidly become thickened with a smooth or longitudinally striate, rather yellowed to reddish brown epidermis; its obtuse to rounded, well developed stipules; its shiny, stiff, generally oblanceolate to obovate leaves with a shortly acute to acuminate apex, moderately developed petioles, well marked venation, and no domatia; its sessile to quite shortly pedunculate inflorescences with the flowers subsessile in glomerulate groups; its somewhat developed, truncate calyx limb; and its rather large (7-9 mm long), yellow to red fruits that characteristically develop an elongated stipe as they mature. The combination of subsessile flowers and stipitate fruits is charcteristic, but it can be difficult to determine on the fruiting specimens whether the flowers were sessile or pedicellate.

CMT: The plants included in Psychotria menalohensis by me for now agree with the characters given in the description and with at least many of the paratype specimens identified by Bremekamp. However there appears to be a taxonomic problem here, because the type specimen of Mapouria menalohensis does not seem to match these paratype specimens or agree completely with the protologue. In fact this type possibly should be compared closely with Psychotria morley-smithii. The type specimen has shortly corymbiform inflorescences with well developed peduncles, while the protologue description characterizes this species as having sessile or subsessile, generally fasciculate or subfasciculate inflorescences. So far the type specimen has not been matched by CMT with modern material, therefore it is not conclusively determined that it is different and also the exclusion of the paratypes from the circumscription of this species cannot be made. The geographic data here were coded by P. Phillipson, June 2012, and it's not entirely clear what species these correspond to; some of the specimens det. with this name by the P team clearly are actually Psychotria parkeri. CMT includes many additional specimens in this species, from more than 5 localities, see the list of specimens annotated by her for the geographic data corresponding to her species circumscription. No communication has been made by P. Phillipson about this species so the apparently different circumscriptions cannot be reconciled.

CMT: Psychotria menalohensis is similar to Psychotria anjanharibensis, which differs in its pedicellate flowers and longer calyx limb, 1.8-3 mm long; these species have been extensively confused in herbarium identifications. Psychotria menalohensis is also similar to Psychotria onivensis, but Psychotria onivensis has pedicellate flowers and leaves that are generally elliptic (i.e., widest near the middle). Psychotria parkeri can be recognized by its small corollas, with the tube 3-4 mm long, and fruits that do not develop a stipe.