Abstract
Eight new Neotropical species of Psychotria subg. Psychotria are described and illustrated here: P cerrocoloradensis of western Panama and P matagalpensis of northern Nicaragua have both previously been confused with P sylvivaga Standley and P chiriquina Standley; P cornejoi of western Ecuador has been previously confused with P trivialis Rusby; P jefensis of Costa Rica and Panama and P orosioides of Costa Rica have both been previously confused with P orosiana Standley; P. lorenciana of southern Mexico and Guatemala has been variously confused with P grandis Swartz, P. Jiava Oersted ex Standley, and P costivenia Grisebach; and P romolerouxiana of Amazonian Ecuador and Peru and P sacciformis of lowland Colombia, Ecuador, and Peru have both previously been confused with P borjensis Kunth. The interpretations of stipule morphology and the arrangement of the flowers on the higher-order inflorescence axes as taxonomically informative characters have varied among previous authors and are re-evaluated here.
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