ABSTRACT Tacinga saxatilis (Ritter) N.P.Taylor & Stuppy subsp. saxatilis belongs to the Cactaceae, a family of succulent plants. We report a new records of the Tacinga genus (Cactaceae) from Goiás State, Central-West Region and Tocantins State, North Region of Brazil, within the Cerrado phytogeographic domain, providing new data on the geographic distribution of this species to the flora of Brazil and increasing the number of species of the family for these brazilian States.

RESUMO Tacinga saxatilis (Ritter) N.P.Taylor & Stuppy subsp. saxatilis pertence às Cactaceae, uma família de plantas suculentas. Relatamos um novo registro do gênero Tacinga (Cactaceae) para os Estados de Goiás, Região Centro-Oeste e Tocantins, Região Norte do Brasil, no domínio fitogeográfico do Cerrado, contribuindo com novos dados sobre a distribuição geográfica dessa espécie para a flora do Brasil e aumentando o número de espécies da família para esses Estados brasileiros.

ABSTRACT During fieldwork in Serra Negra da Mantiqueira, Minas Gerais state, southeastern Brazil, a new taxon of Passiflora, subgenus Astrophea, was collected in cloud forest areas. Passiflora purii, the new species, is characterized by the conical trochlea and the totally vinaceous corona, and was named in honor of the Puri ethnic group that inhabited the mountain range where its population was located. Detailed data on the distribution, habitat, reproductive phenology, and conservation status of the new species, as well as a key to closely related taxa of subgenus Astrophea are provided.

ABSTRACT The subgenus Astrophea is one of the most critical and neglected subgenera of the genus Passiflora. Seven Brazilian species of P. subg. Astrophea were found to be in need of typification. Lectotypes are designated for the following names: Passiflora cauliflora, P. leptopoda, P. ceratocarpa, P. faroana, P. rhamnifolia, P. sclerophylla and P. tessmannii. An epitype was also designated for the name P. tessmannii. In addition, Passiflora alliacea was synonymized with Passiflora pentagona.

ABSTRACT During taxonomic review of the Brazilian species of the Passiflora subgenus Astrophea and P. subg Decaloba, six names published by the Brazilian botanist João Barbosa Rodrigues were found in need of discussion: Passiflora alliacea, P. amalocarpa, P. cabedelensis, P. hexagonocarpa, P. hydrophila and Tacsonia coccinea. The original illustrations are here designated as lectotypes for P. alliacea, P. amalocarpa, P. cabedelensis (a synonym of P. amalocarpa), P. hexagonocarpa, P. hydrophila (a synonym of P. costata) and Tacsonia coccinea (a synonym of P. spinosa).

ABSTRACT The center of diversity for Passiflora subg. Astrophea is in low altitude areas of northern South America. The majority of species of this group are difficult to find in nature. Seed morphology was described in detail for 25 species of Passiflora subgenus Astrophea, a subgenus that until now did not exist. For morphological analysis, 20 seeds per species were measured for length, width and thickness, and the arithmetic means calculated. The seeds varied in length, width and thickness. Eight types of ornamentation were found. The margins varied among crestate, dentate, parted, entire and parted-crestate. The seed apex can be distinguished by the shape and position of the apical appendage. Seed shape varied among obovate, lanceolate, cordiform, and oblong to elliptical. An identification key was developed and a PCA was performed both using the principal morphological characters. Morphological characters of seeds are a new source of data for delimiting taxa with quite conflicting morphological boundaries, such as seen here with the Passiflora subgenus Astrophea. Furthermore, seed morphology is especially useful for the identification of specimens with only fruits and, consequently, seeds available.

Pollen grains from twelve species of the Passifloraceae family from the Brazilian Atlantic Forest were analyzed: Passiflora subg. Astrophea (1sp.), P.subg. Decaloba (1sp.) and P.subg. Passiflora (10spp.). The current study aims to acquire additional information and feature the pollen morphology of the herein studied species to help setting a more precise taxa delimitation. Acetolyzed pollen grains were measured, described and illustrated using light and scanning electron microscopy. The pollen grains were medium or large sized, oblate spheroidal, suboblate, prolate spheroidal and subprolate; 4-colpate (P. kermesina), 6-12-pantocolporate (P. mediterranea), 6-colpate (P. mucronata), 6-colporate (P. pentagona), 12-colporate (P. misera) or 6-syncolpate (in most species). The presence of reticulate sexine, pseudopercula, pontopercula and/or opercula was observed. The endoaperture was just found in P. pentagonaand P. misera. It was concluded that pollen morphology is an important source of taxonomic features useful for distinguishing species and characterizing the three subgenera. The current study provides additional information that, along with other previously published studies, will enable a better understanding of phylogenetic relations among these strains.

Neste trabalho são apresentadas as espécies de Passifloraceae da Serra Negra, parte da Serra da Mantiqueira localizada no sul da Zona da Mata de Minas Gerais, nas coordenadas 21º58'11"S e 43º53'21"W. A vegetação é representada por um mosaico de campos rupestres e florestas semidecíduas e ombrófilas. A família está representada por 12 espécies pertencentes ao gênero Passiflora: P. alata Curtis, P. amethystina J.C.Mikan, P. campanulata Mast., P. capsularis L., P. edulis Sims, P. haematostigma Mart. ex Mast., P. marginata Mast., P. mediterranea Vell., P. porophylla Vell., P. sidifolia M.Roem., P. speciosa Gardner e uma espécie ainda não identificada, possivelmente tratando-se de um novo táxon. Para reconhecimento das espécies são apresentadas chave de identificação, descrições, ilustrações, distribuição geográfica e comentários taxonômicos das espécies.

In this study are presented the species of Passifloraceae from Serra Negra, a part of Serra da Mantiqueira located in South Zona da Mata of Minas Gerais, in the coordinates 21º58'11"S and 43º53'21"W. The vegetation is represented by a mosaic of "campos rupestres" and semideciduous forests and rainforests. The family is represented by 12 species that belong to the genus Passiflora: P. alata Curtis, P. amethystina J.C.Mikan, P. campanulata Mast., P. capsularis L., P. edulis Sims, P. haematostigma Mart. ex Mast., P. marginata Mast., P. mediterranea Vell., P. porophylla Vell., P. sidifolia M.Roem., P. speciosa Gardner and a species not identified, probably a new taxon. To recognize the species, identification key to species, descriptions, illustrations, geographical distribution and taxonomical comments are provided.