Maria Teresa Buril

Jacquemontia macrocalyx (Convolvulaceae), a New Species Endemic to the Espinhaço Range, Brazil

Abstract.  Jacquemontia macrocalyx Buril (Convolvulaceae) is described from Morro do Chapéu, Cadeia do Espinhaço, Bahia, Brazil. The new species is related to J. heterantha (Nees & Mart.) Hallier f., but is distinguished by its fruticose habit and larger sepals. Its conservation status is assessed as Endangered (EN), according to IUCN Red List criteria. Resumo.  Jacquemontia macrocalyx Buril (Convolvulaceae) é descrita como endêmica do Parque Estadual de Morro do Chapéu, Cadeia do Espinhaço, Bahia, Brasil. A nova espécie é similar a J. heterantha (Nees & Mart.) Hallier f., mas se distingue pelo hábito arbustivo e sépalas maiores. O seu status de conservação é considerado como EN ou em risco de extinção, de acordo com os critérios da IUCN.

Jacquemontia robertsoniana (Convolvulaceae), a new shrub species from Brazil

SummaryJacquemontia robertsoniana, a new shrub species from Brazil, is described. The relationship of J. robertsoniana with other shrub species of this genus is discussed. Illustrations, a distribution map, and an identification key are provided. The conservation status is assessed according to IUCN criteria.

Pollen morphology and taxonomic implications in Jacquemontia Choisy (Convolvulaceae)

Abstract Jacquemontia is one of the larger genera in Convolvulaceae, with around 120 species, and is considered taxonomically difficult. The family is eurypalynous and pollen morphology has been considered as an important taxonomic character. Pollen morphology of 43 species, representing all morphological groups of Jacquemontia, was analysed with light microscopy and/or scanning electron microscopy. Three pollen types were characterised. These pollen types do not corroborate the current circumscription of sections in Jacquemontia, which is based on inflorescence structure. Conversely, however, some macro-morphological features are discussed that support groups defined on the basis of pollen analysis.

Towards a Better Understanding of the Tribe Aniseieae: Revisiting Aniseia and Iseia (Convolvulaceae)

Abstract In this paper we propose a new circumscription of Aniseia that includes Iseia and reduces Aniseia martinicensis var. ambigua and A. cernua to the synonymy of A. martinicensis. The new combination Aniseia luxurians is made. The three species of Aniseia recognized herein are characterized by simple trichomes; simple leaves with entire margin, mucronate apex and eucamptodromous venation; axillary cymose inflorescences, or solitary flowers; unequal to subequal sepals; campanulate corolla; single style; glandular trichomes at bases of filaments, sagittate anthers, and 2-globose and papillose stigma. Furthermore, twelve new synonyms and eleven lectotypifications are proposed herein. We provide an identification key, illustrations, comments on geographical distribution, and specimen-based distribution maps, as well as taxonomic and nomenclatural information.

Convolvulaceae da Microrregião do Alto Capibaribe, PE, Brasil

Convolvulaceae apresenta distribuicao cosmopolita com maior diversidade nos Neotropicos. No Nordeste do Brasil, onde os estudos sobre a familia sao recentes, sao encontrados 18 generos e 209 especies. Sendo assim, este trabalho objetivou ampliar os estudos de Convolvulaceae na regiao, enfocando a microrregiao do Alto Capibaribe em Pernambuco. A familia e representada na area por 20 especies incluidas nos generos Evolvulus (duas spp.), Ipomoea (oito spp.), Jacquemontia (cinco spp.), Merremia (tres spp.), Operculina (uma sp.) e Turbina (uma sp.). Metade das especies sao novos registros para area. Sao apresentadas descricoes, comentarios taxonomicos e de distribuicao, ilustracoes e uma chave de identificacao.

Remarkable disjunctions in Ipomoea species (Convolvulaceae) from NE Brazil and Central America and their taxonomic implications

SummaryRecent collections of Ipomoea from North East Brazil have revealed a number of unexpected disjunct distributions. The most remarkable is that of I. eremnobrocha D. F. Austin, previously thought to be endemic to Panama but now known from three states in NE Brazil. Revision of Panamanian material named I. eremnobrocha unexpectedly showed that two distinct species had been treated under this one name. Specimens from the Chagres National Park area in Panama are described as a new species under the name I. isthmica J. R. I. Wood & Buril while I. eremnobrocha is retained as the correct name for the plant from the Altos de Campana in Panama and NE Brazil. An amended description of this species is given and a table of differences between the related species is provided. Two recently described species from Bolivia, I. graniticola J. R. I. Wood & Scotland and I. chiquitensis J. R. I. Wood & Scotland are recorded from NE Brazil several thousand km from their type localities. Attention is drawn to the role of granite inselbergs as sites of species with a disjunct distribution. A possible relative of I. chiquitensis is described as a new species from NE Brazil under the name I. melancholica J. R. I. Wood & Buril. The new species are illustrated with line drawings and maps of the unusual distribution patterns are provided.