A new species of Pleurothallis (Pleurothallidinae, Orchidaceae) from the historic sanctuary of Machupicchu, Perú

<i>Pleurothallismachupicchuensis</i>, a new species from Cusco, Perú, is described and illustrated. Information regarding its distribution, habitat, and phenology is provided. Morphologically, <i>P.machupicchuensis</i> closely resembles <i>P.scurrula</i> and <i>P.sannio</i> but can be distinguished mainly by the morphology of the lip. The new species features an ovate, obtuse lip with a prominent bilobed, reniform glenion, in contrast to the oblong-ovate, acute lip with a small rounded glenion observed in <i>P.scurrula</i>, and the ovate, rounded lip with an oblong glenion in <i>P.sannio</i>.