Resumen Gauto, S. Y.; M. Nuñez Florentin, A. M. Gonzalez & R. M. Salas. Tipificación de nombres en Manettia (Rubiaceae, Spermacoceae) para la Flora de Argentina y Paraguay. Darwiniana, nueva serie 10(2): 429-434. Manettia es un género neotropical que incluye unas 80 a 130 especies. Como parte de la revisión taxonómica del género para los proyectos de “Flora Argentina” y “Flora del Paraguay” se hallaron siete nombres que necesitan estudios nomenclaturales. Como resultado se designan cinco lectotipos y dos neotipos y se incluyen notas sobre las tipificaciones.

Abstract Gauto, S. Y.; M. Nuñez Florentin, A. M. Gonzalez & R. M. Salas. Typification of names in Manettia (Rubiaceae, Spermacoceae) for the Flora of Argentina and Paraguay. Darwiniana, nueva serie 10(2): 429-434. Manettia is a Neotropical genus that includes 80 to 130 species. As part of the taxonomical review of the genus for the “Flora Argentina” and “Flora del Paraguay” projects, seven names were found in need of nomenclatural studies. As a result five lectotypes and two neotypes are here designated and notes on these typifications are included.

Resumen Introducción y objetivos : Durante la revisión de las especies del género Oldenlandia para el sur de Sudamérica, poblaciones de O. corymbosa fueron halladas en Paraguay y Argentina. El objetivo de esta contribución es reportar por primera vez la presencia de esta especie adventicia para la flora de Paraguay y Argentina. M&M : Se estudiaron plantas vivas y material de herbario, tanto como la descripción original de Oldenlandia corymbosa. Se realizaron análisis taxonómicos y morfológicos. El material coleccionado fue depositado en FCQ y CTES. Resultados : Se proporciona una descripción de la morfología y hábitat de la especie sobre la base de especímenes de herbario y observaciones de campo, junto con una ilustración, fotografías, y un mapa que indica la posición geográfica de las poblaciones registradas en el nordeste y sur de Paraguay y nordeste de Argentina en la provincia de Corrientes. Complementariamente, se proporciona una clave de identificación de las especies de Oldenlandia presentes en Argentina y Paraguay. Conclusiones : Con el registro de Oldenlandia corymbosa en Paraguay y Argentina, se amplía el rango de distribución de esta especie alóctona hasta el Cono Sur de América del Sur. Su estatus de especie naturalizada en Paraguay plantea la posibilidad de que fuera, hasta ahora, ignorada en otras regiones del Nordeste Argentino.

SUMMARY Background and aims : During the revisión of the Southern South American species of Oldenlandia, populations of O. corymbosa were found in Paraguay and Argentina. The aim of this contribution is to report the presence of this adventitious species to the Paraguayan and Argentinian flora for the first time. M&M : Living plants and herbarium material, as well as the original description of Oldenlandia corymbosa were analysed. Taxonomic and morphological analyses were performed. Collected materials were deposited in FCQ and CTES. Results : A description of the morphology of the species and habitat based on herbarium specimens and field observations are provided, along with an iNustration, photographs, and a map indicating the geographical position of the recorded populations in the Northeast and South Paraguay and Northeast Argentina in the Corrientes province. Complementary, an identification key of Oldenlandia species occurring in Argentina and Paraguay is provided. Conclusión : With the record of Oldenlandia corymbosa in Paraguay and Argentina, the range of distribution of this non-native species is extended up to the Southern Cone of South America. Its status of naturalized species in Paraguay raises the possibility that it was, until now, overlooked in other regions of the Northeast Argentina.

ABSTRACT Thirteen species of the genus Galianthe have been recorded for state of Rio Grande do Sul, Brazil. The species are distributed among seven biomes, one of which contains all thirteen taxa-Subtropical Seasonal Forest. Herein a new endemic species, G. riograndensis J. Florentín & E.L. Cabral, is described, illustrated and differentiated from all other species of the genus by having 3-4 verticillate leaves and a long bifid style. In addition, the pollen grain morphology and the seed micromorphology of the new species are described and illustrated, and the conservation status assessed according to IUCN criteria. Moreover, G. chodatiana is recorded for the first time from the state, and a lectotype for G. equisetoides is designated. Most of the species of Galianthe are described and illustrated with detailed photos of living specimens. A taxonomic key for species identification, as well as comments on distribution, overall phenology and habitat, are also presented. The distribution of the new species is discussed in the context of the biogeographic region of the state, and maps and a table of species by biome are also provided.

ABSTRACT The genus Oldenlandia (Rubiaceae) has a conflicting generic delimitation, with representatives that show different floral syndromes. Oldenlandia salzmannii is a marshy herb that is widespread in South America. It is heterostylous, specifically distylous, and self-compatible. Recent molecular phylogenetic studies found that this species forms a clade that is isolated from the remaining described taxa of Oldenlandia. Information about the floral anatomy and reproductive biology of genera in the Spermacoceae tribe, particularly Oldenlandia, is insufficient, especially among the neotropical species. Accordingly, the present study aimed at contributing information on the reproductive biology of Oldenlandia salzmannii by analyzing its floral morpho-anatomy, morphometrics and phenology of both floral morphs. These analyses were conducted with natural, cultivated and fixed material using optical and scanning electron microscopes. Morphologically, the species is typically heterostylous with two floral morphs, long-styled and short-styled, the main difference being the indument of the corolla. The short-styled flowers have larger anthers and pollen grains. Morphometrics show a high degree of herkogamic reciprocity. The mature ovules have a hemitropous position, which is the first record of this position for the Spermacoceae tribe. This study represents the first comprehensive morphological study of Oldenlandia salzmannii.