Nara Furtado de Oliveira Mota

Flora das cangas da Serra dos Carajás, Pará, Brasil: Thymelaeaceae

This study presents the only species of Thymelaeaceae recorded for the cangas of the Serra dos Carajas, in Para state: detailed description, illustration and morphologic comments on the species are given. Daphnopsis filipedunculata is described to the Serra dos Carajas and this species is considered restricted to the canga formations in the region, recorded in only three areas of Serra Norte so far: N1, N2 and N5 plateaus.

Xyridaceae of Viruá National Park, Roraima state, Brazil

A taxonomic treatment of the Xyridaceae in the Virua National Park is presented. Located in Roraima state, northern Brazil, the park comprises a mosaic of lowland vegetation types, including forests, wetlands, and one of the largest continuous areas of campinarana in the Brazilian Amazon Basin. Xyridaceae are represented in the park by 20 species in the genera Abolboda and Xyris. Although the four species of Abolboda are widespread, most of the Xyris species (75%) are endemic to Amazonian open vegetation formations, such as campinaranas and savannas. This study was based on field, herbarium, and scanning electron microscopy research. The taxonomic treatment includes identification keys to the genera and species, morphological descriptions, SEM images of seeds for Xyris species, iconography, geographic distribution and comments on the ecology of the species. The poorly known Xyris connosepala is synonymized in Xyris guianensis.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Lentibulariaceae

The present study comprises the specis of Lentibulariaceae that occur on iron-stone outcrops (canga) at the Serra dos Carajás, Pará, Brazil, including identification keys, detailed descriptions, illustrations and comments regarding these species. There were 12 species recorded, distributed in two genera: Genlisea (one species) and Utricularia (11 spp.).

Flora das cangas da Serra dos Carajás, Pará, Brasil: Apocynaceae

Ministerio da Educacao, Universidade Federal Rural da Amazonia e Museu Paraense Emilio Goeldi.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Monimiaceae

The only species of Monimiaceae recorded so far for the cangas of Serra dos Carajás is Mollinedia ovata, a widely distributed species in the Antilles and South America. Locally this species has a restricted distribution, found only in the Serra Sul (S11A and S11B) and Serra Norte (N7). A detailed description, illustration and comments on morphology, distribution and habitat of this species are presented here.

Buchnera carajasensis (Orobanchaceae), a new species from the canga vegetation of the Serra dos Carajás, Pará, Brazil

SummaryBuchnera carajasensis is described and illustrated. Information on its conservation status, taxonomy, habitat, geographic distribution, and phenology, along with a key to the Buchnera species found in Pará, is provided. The new species had previously been confused with B. tenuissima, a Mexican species, and is also similar to B. palustris, but exhibits differences in the inflorescence shape, in the indumentum, and in reproductive traits. The new species is apparently endemic to ironstone outcrops of the Serra dos Carajás, northern Brazil, and is assessed as Endangered in accordance with the IUCN criteria.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Styracaceae

This study is the floristic survey for the Styracaceae recorded in the cangas of the Serra dos Carajas, Para state, bringing detailed descriptions, illustrations, and morphological comments for the species. Two species of Styrax were recorded: S. griseus and S. pohlii. Styrax griseus was described based on material collected in the Serra dos Carajas, but is not endemic to the area. Styrax pohlii is widely distributed throughout the Northern portion of South America.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Xyridaceae

This study encompasses the species of Xyridaceae recorded in the cangas of Serra dos Carajas, Para state, bringing detailed descriptions, illustrations, morphological comments and distribution of the species in the study area. Two species of Xyris are recorded: X. brachysepala, endemic to Serra dos Carajas, and X. macrocephala, widely distributed in the Neotropics.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Mayacaceae

Mayacaceae e uma pequena familia de monocotiledoneas composta apenas pelo genero Mayaca, com cinco especies. Na Serra dos Carajas sao encontradas tres das quatro especies registradas para a America do Sul: Mayaca fluviatilis, M. kunthii e M. longipes. Sao apresentados neste estudo descricoes, ilustracoes e comentarios morfologicos para estas especies.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Gnetaceae

Gnetaceae is a small, monotypic family of Gymnosperms with about 40 species of Gnetum of pantropical distribution. Of the three species found in the FLONA Carajas, G. leyboldii and G. schwackeanum occur in the forest, while only G. nodiflorum was recorded in canga. For Gnetum nodiflorum, a detailed morphological description, illustrations, distribution and morphological comments are presented.