Esta pesquisa tem por objetivo levantar e descrever as espécies de Passifloraceae que ocorrem na Área de Proteção Ambiental de Belém (APA-Belém). A família Passifloraceae está representada, na área de estudo, por dois gêneros: Dilkea (D. johannesii)e Passiflora (P. acuminata, P. auriculata, P. araujoi, P.ceratocarpa, P. foetida, P. nitida, P. glandulosa, P. picturata, P. quandrangularis, P. serratodigitata, P. tholozanii, e P. vespertilio), totalizando 13 espécies. Uma nova ocorrência de P. ceratocarpa foi registrada para o estado de Mato Grosso. A presença de corona com três séries de filamentos em P. glandulosa é relatada como um novo caráter diagnóstico para a espécie. A partir desses resultados, podemos concluir que se fazem necessários novos estudos para ampliação do conhecimento desta família na região amazônica.

We report the first records of Tillandsia kegeliana, T. loliacea, T. paraensis, T. parvispica, T. recurvata, and T. tenuifolia for Maranhão, Brazil. These species were collected in the Amazonian and Cerrado biomes. This work adds new knowledge to the flora of Maranhão and extends the distribution of these species within Brazil.

Dipteryx odorata (Aubl.) Willd. and Taralea oppositifolia Aubl., Fabaceae: Dipterygeae, are two Amazonian species of great economic and pharmacological potential. The anatomy of these species, however, remains poorly studied. The aim of this work was to inventory leaf anatomical characteristics of D. odorata and T. oppositifolia and to locate and identify secretory structures and determine the main classes of metabolites they store. Vegetative branches were collected in Parque Ecológico de Gunma, Belém, state of Pará, Brazil. Some of the branches were destined for herborization while the remainder was submitted to standard protocols for anatomical analysis and histochemical tests. Both species were found to possess an unstratified epidermis, with D. odorata being amphistomatic and T. oppositifolia being hypostomatic, and dorsiventral mesophyll with spongy parenchyma and wide cellular space. The two species were also found to possess idioblasts and secretory cavities that produce a heterogeneous exudate consisting of polysaccharides, lipids, alkaloids and phenolic compounds. The species presented differences in leaf anatomy and chemical composition of the secretory structures, which may be useful in their differentiation.