Roberto Manuel Salas

Dos especies nuevas de Borreria (Rubiaceae), sinopsis y clave de las especies para Bahia, Brasil

This work deals with a taxonomic study of the genus Borreria (Rubiaceae) for the state of Bahia, 29 species are recorded. Most of these species are distributed in the cerrado and Atlantic forest biomes. Two new species are described and illustrated, Borreria catolensis E.L. Cabral & L.M. Miguel and Borreria diamantinae R.M. Salas & E.L. Cabral. Th e new combination Borreria schumannii (Standl. ex Bacigalupo) E.L. Cabral & Sobrado is proposed. Neotype is designated for B. virgata. Epitype is designated for B. scabiosoides and lectotypes are designated for B. eryngioides and B. humifusa. A key for identification, comments on geographic distribution and habitats are provided, maps and a table with the species distribution for biomes are also included. Borreria crispata, B. cupularis, B. humifusa, B. virgata and B. wunschmannii are illustrated for the first time. The identities of B. ocymoides and B. prostrata are discussed; the fi rst species is also illustrated. Borreria virgata and B. spinosa are reinstated. Two figures with representative photographs of 20 species are included.

Dos nuevas especies de Staelia (Rubiaceae) con hojas ternadas del nordeste de Brasil

ResumenDos especies nuevas de Staelia con hojas ternadas son descritas e ilustradas. La primera, Staelia paganuccii, fue colectada en el bioma cerrado, mientras que la segunda, S. domingosii pertenece al dominio de las Caatingas del complejo de la Chapada Diamantina. Las dos especies son comparadas con las especies más cercanas del género. Se presentan además fotografías de ambas especies en sus ambientes. Se agrega un breve comentario sobre las inflorescencias de Staelia y su relevancia es discutida.AbstractTwo new Brazilian species of Staelia with ternate leaves are described and illustrated. The first, Staelia paganuccii, was collected in the cerrado biome, whereas the second, S. domingosii belongs to the Caatingas domain of the Chapada Diamantina complex. The affinities of the two species within the genus are discussed. Photographs of the plants in their natural environments are provided. A brief commentary on the inflorescence structure of Staelia is presented and its importance is discussed.

Una especie nueva del genero Staelia (Spermacoceae-Rubiaceae) para la flora de Brasil

A new species of the genus Staelia Cham. & Schltdl. from Brazil is described and illustrated. Staelia tocantinsiana Salas, R. M. & E. L. Cabral. A key to differentiate the related species is provided.

Synopsis of Hexasepalum (Rubiaceae), the Priority Name for Diodella and a New Species from Brazil

Abstract Hexasepalum is the priority name for Diodella. In the present paper, we provide a synopsis of Hexasepalum. The genus differs from the remaining genera of the tribe Spermacoceae by the combination of infundibuliform flowers, 2-lobed stigmas, schizocarpic fruits, ventral face of the mericarps with two depressions, seeds with T or Y shaped ventral grooves, and pollen grains with two types of supratectal elements. We propose two combinations, i.e. Hexasepalum domingense and H. vaginale, and the formal synonymization of H. angustifolium (including Diodella crassifolia). We also propose two new synonyms: Diodia rosmarinifolia [= Diodella rosmarinifolia] is placed in the synonymy of H. apiculatum, and Diodia incana is now considered a synonym of H. teres. We choose lectotypes for H. vaginale, and for two synonyms of H. apiculatum. In addition, we describe and illustrate a new species endemic from Bahia, Brazil, H. zappiae sp. nov. Detailed descriptions are provided only for the species imperfectly known; otherwise comprehensive taxonomic descriptions are mentioned for each species. The descriptions of the Hexasepalum species are complemented with a key, geographical distributions, and illustrations of key morphological characters. Line drawings are provided for species not illustrated before in literature.

Randia brevituba (Rubiaceae), a New Species from the Southern Cone of America and Comments on Randia armata

Abstract Randia brevituba is a new species of the Paranean region of Argentina and Paraguay. It differs from the closest species, R. ferox, which is sympatric, in having short corolla tubes of 4.7–5.4 mm in the pistillate flowers and 2.8–7.9 mm in the staminate flowers, calyx lobes varying in shape and size in the same pistillate flower, and globose fruits 14–17 mm long (versus corolla tubes of 25.0–27.0 and 22.6– 34.0 mm long, respectively, calyx lobes equal in shape and size, and fruit 3–5 cm and ovoid, ellipsoid or subglobose in R. ferox). We also discuss the taxonomic concept and geographic distribution of Randia armata, and conclude that it is markedly different from R. brevituba and the other species in the Southern Cone studied here, and moreover, that it does not occur in the Southern Cone. We provide a taxonomic key to distinguish the new species from other species of Randia in the Southern Cone of America.

Two New Shrubby Species of the Genus Staelia (Rubiaceae) from Serra do Curral Frio, Bahia, Brazil

Abstract Two new shrubby species of Stadia (Rubiaceae) from northeastern Brazil are described and illustrated. Staelia glandulosa inhabits rocky fields on white sand areas, and differs from S. virgata in its shrubby habit, entirely glandular stipular bristles, large flowers, number of calyx lobes and large seeds. Staelia harleyi was found in the Cerrado biome on sandstone rocks at altitudes of 1,000 m, recognizably different from S. virgata because the plant is shrubby, its calyx is a conspicuous tube, the calyx lobe is longer than the corolla tube, the corolla lobes are internally pilose, the ventral face of seeds has transverse furrows and the bracteole is sagittate at the apex. Electron microphotographs of the fruit and seed and images of both species in their habitats are provided.

Revisiting Psyllocarpus goiasensis (Rubiaceae: Spermacoceae): a new synonym, notes on type specimens, and conservation status assessment of this endemic species from the campo rupestre of Goiás state, central Brazil

SummaryPsyllocarpus goiasensis J. H. Kirkbr. is an endemic species from the campo rupestre of Goiás. Psyllocarpus laricoides Mart. & Zucc. var. γ longicornu K. Schum., formerly under the synonymy of P. laricoides, is treated here as a new synonym of P. goiasensis. A second-step lectotype is designated for this variety. The first illustration and photographs of P. goiasensis, as well as a distribution map and comments on its ecology are presented. This species is assessed as Endangered (EN) under the range size (B) criterion of the IUCN.

Colleters in American Spermacoceae Genera (Rubiaceae): Morphoanatomical and Evolutionary Aspects

Premise of research. The primary goal of this study is to describe the colleters on vegetative and reproductive organs in the Spermacoceae tribe and to characterize their morphoanatomy, their distribution, and some functional and evolutionary aspects. Methodology. The anatomy, development, and vascularization of colleters from 28 species were studied using standard light and scanning electron microscopy based on fresh and fixed material. Our results are interpreted within the framework of recent molecular phylogenies. Pivotal results. Standard-type colleters were found on stipules, calyx, and bracteoles, and they were also found on underground buds in five species of Galianthe. Six species have green colleters, and two have vascularized colleters. We discuss previously unknown functional aspects based on the Staelia glandulosa colleters and propose a new term: long-lived colleters. Conclusions. This article describes the anatomy of colleters in the Spermacoceae tribe of the family Rubiaceae in detail. The presence of underground colleters in Galianthe grandifolia is confirmed and extended to other species of the genus. Vascularization is recorded for the first time in colleters of Mitracarpus and Staelia. This study provides data about the type, distribution, and anatomy of colleters in Spermacoceae, contributing important information for ongoing phylogenetic studies in the tribe. The proposal of a new functional type of colleter based on anatomical, morphological, and ecological aspects, named long-lived colleter, reflects the need to perform further comprehensive studies based on multidisciplinary approaches.

Identidad taxonómica de Diodia angustata (Rubiaceae) y su transferencia a Planaltina

Fil: Cabana Fader, Andrea Alejandra. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Nordeste. Instituto de Botanica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botanica del Nordeste; Argentina

Sobre la identidad de Spermacoce polygonifolia ySpermacoce perijaensis(Spermacoceae-Rubiaceae)

We present two new combinations in species of the Spermacoceae tribe from South America: Spermacoce polygonifolia is transferred to genusMitracarpus and S. perijaensis toTobagoa. We propose a lectotype for Tobagoa maleolens and neotype for Diodia ottonis.