Rubiacearum Americanarum Magna Hama Pars XVIII:: New species of Psychotria subg. Psychotria from Central America and western South America

Nine new Neotropical species of Psychotria subg. Psychotria (Rubiaceae, Psychotrieae) are described and illustrated here: P. areolata of montane western Colombia has previously been confused with P. rugulosa Kunth, P. ceronii of eastern Andean slopes in Ecuador and Peru has previously been confused with P. acreana K. Krause; P. convergens of montane Costa Rica, Panama, Colombia, Ecuador, and northern Peru has previously been confused with P. sylvivaga Standley; P. cutucuana of montane Ecuador has previously been confused with Notopleura; P. esmeraldana of coastal Ecuador and Colombia has previously been confused with P. orosiana Standley; P. montivaga of montane Colombia, Ecuador, and Peru has previously been confused with P. alba Ruiz & Pavon and P. carthagenensis Jacquin, and replaces these species at higher elevations; P. paravillosa of Amazonian Ecuador and. Peru has previously been confused with P. villosa Ruiz & Pavon; P. puyoana of eastern Andean slopes of Ecuador is notable for its subsessile, cordate, relatively large leaves; and P. ucumariana of montane Colombia and Ecuador has previously been confused with P. rimbachii Standley.