Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

É descrita e ilustrada Catasetum colidense, oriunda das margens do rio Teles Pires, estado de Mato Grosso, Brasil. A nova espécie é comparada com as espécies morfologicamente próximas.   

Two Philippine Vanda species long confused with the Javanese species V. limbata and V. helvola are here described as V. mariae and V. cootesii. A key to the genus Vanda in the Philippines is provided. 

The history of the taxonomy of Pleurothallis R.Br. subsection Macrophyllae-Fasciculatae and recent descriptions in that group are summarized. The phylogenetic position of the group based on preliminary molecular data and the appropriateness of the proposed genera Acronia C.Presl. and Zosterophyllanthos Szlach. & Marg. for this group are discussed. Three new species from northern South America are described: Pleurothallis rubrifolia from southeastern Ecuador and northeastern Peru; Pleurothallis nangaritzae from southeastern Ecuador; and Pleurothallis castanea. Labellar micromorphology examined by scanning electron microscopy for P. rubrifolia and P. nangaritzae is discussed in relation to taxonomy and possible pollinator interactions.

A new and showy Masdevallia from the Huanuco region in Peru is described and illustrated with a line drawing and color photographs. It belongs to the subgenus Masdevallia, section Masdevallia. The new species is compared to several more or less morphologically similar species, such as M. burianii, M. cranion and M. popowiana that appear to be closely related. The new species differs from them by a combination of features, including the rather fleshy leaves and the bell-shaped flowers covered internally with magenta to white pubescence.

A new species of Oliveriana is described and illustrated. It is compared with and distinguished from all other listed members of the genus by a unique combination of distinct features, such as the extremely elongate and narrow leaves, and a flower with a fleshy triangular lip. It is speculated here that this new species may be self-pollinating due to the high success of seed pod production, which is unusual among genera in Oncidiinae. 

Gibsoniothamnus ficticius (Schlegeliaceae), a new species from Costa Rica, is described and illustrated, including notes on the relationships with related taxa. A brief synopsis for the genus in Costa Rica is provided, with a key for all the species. 

Three species of Orchidaceae are described as new to science: a Telipogon and a Lankesterella from the Dominican Republic and an Encyclia from Cuba. Telipogon niri is based on material collected by Donald Dod from the Cordillera Central A rare species, T. niri was previously recognized as Stellilabium minutiflorum (Kraenzl.) Garay, a distinct species from Central America. The generic name has changed due to unequivocal molecular evidence offered by Norris Williams, and the specific epithet honors Dr. Mark Nir, an avid student of Caribbean orchids. Lankesterella glandula is also based on material collected by Dod from the Cordillera Central. Thus far known only from the type collection, it is the second representative of the genus in Hispaniola. Encyclia monteverdensis is described from 19th century Charles Wright collections from Monte Verde, Cuba. The combination, Dendrophylax filiformis (Sw.) Carlsward & Whitten, suffers as a later homonym and is replaced by the next available name in the new combination Dendrophylax mon- teverdi (Rchb. f.) Ackerman & Nir. Cyclopogon miradorensis Schltr. is reported for the island of Dominica; Cranichis ricartii Ackerman is noted for the island of Guadeloupe; Cranichis ovata Wickstr. and Psilochilus macrophyllus (Lindl.) Ames are noted for Montserrat; and Trinidad is another locality for C. ovata. In addi- tion, Eurystyles domingensis Dod and two Malaxis species are added to the Cuban flora: M. apiculata Dod and M. hispaniolae (Schltr.) L.O. Williams. 

A morphologic revision of Costa Rican species of Smilax is presented. Traditionally, up to 14 species were accepted. In the present paper 7 species are recognized: Smilax domingensis, S. mollis, S. pana- mensis, S. spinosa, S. spissa, S. subpubescens, and S. vanilliodora. The following names are treated as synonyms: Smilax engleriana and S. kunthii of S. domingensis; S. hirsutior, S. angustiflora and S. candelariae of S. mollis, and S. chiriquensis and S. regelii var. albida of S. vanilliodora. Smilax regelii is excluded as a valid taxon and a lectotype of S. gymnopoda is designated. Dichotomous keys with vegetatives and reproduc- tive characters (flowers and fruits) are presented, on the basis of field and herbaria observations. For all the species many important characters useful for identification were included, such as rhizome, stem, size of tepals and variation in berry colour during development stages. 

Notes about ecology and distribution of the genus Lepanthes in Cuba are given. The paper includes a list of all the species recorded for the island, and the location of their types in herbaria. 

Symplocos retusa, a new species restricted to the wet forests of the Pacific slope of the Talamanca range in Costa Rica is described, illustrated, and compared to its closest presumed relative. Symplocos retusa is distinguished by its entire leaf blades with a conspicuous retuse apex; purple, pentamer- ous, pedicellate, solitary, axillary flowers subtended by deciduous bracts; fruit apex flat and distended beyond the point of calyx lobe attachment. It is compared to S. tribracteolata Almeda, another Costa Rican endemic with solitary, pedicellate, white to pink hexamerous flowers and serrulate or crenate leaf blades with acuminate apex.