Leochilus

Abstract: The following new species of Leochilus (Orchidaceae) are described: Leochilus puertoricensis from Puerto Rico, and Leochilus hagsateri from southwestern Mexico. Both species have sister species known from nearby locations that have prevented their recognition as distinct species, even though collections of both have beeen known for many years. Although authors have made over thirty combinations in the genus Leochilus, two species collected a number of times and known for 50 years or more have gone undescribed. Both species have closely related sister species, and specimens of the two unnamed species, one each from Puerto Rico and Mexico, have heretofore been identified as L. labiatus (Sw.) Kuntze and L. carinatus (Knowles & Westc.) Lindley, respectively. A thorough revisionary study of Leochilus (Chase unpubl.) revealed their distinctness from the other seven species in the