Monographs Details: Psychotria lindenii Standl.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Discussion:Psychotria lindenii may eventually be regarded as only an ecological high-altitude variation of P. lupulina subsp rhodoleuca var maypurensis. However, I am regarding them for the present as distinct specific taxa, although it must be admitted that the differences separating P. lindenii from subsp rhodoleuca var maypurensis are minor. Both possess the subsessile or sessile leaves with obtuse or rounded leaf bases. Although the stipular teeth of P. lindenii are generally longer (4-7 mm) than those of P. lupulina subsp rhodoleuca var maypurensis (3-4.5 mm), a collection by Ruiz-Teran 4310 of var maypurensis near the type locality has the uppermost stipular teeth as much as 7 mm long. A further distinction between these two taxa is the calyx border, which in P. lindenii shows elongate subulate teeth projecting above the margin, whereas in P. lupulina subsp rhodoleuca var maypurensis the calyx border is either repand-undulate or the projections are shallow, short, or rounded at their apices.