4. Bioquímica. Doutora em Ciências Biológicas (Botânica).

Pará state has one of the longest coastal in Brazil. However, floristic surveys have been conducted in few regions and only one study has comprehensively evaluated the coastal flora of the state. The objective of this study was to create an updated and certified checklist of the angiosperms in the restingas of Pará. The list was made using literature, floristic and taxonomic revisions, herbaria specimens from HBRA, IAN, MFS and MG, and collections made between 2014 and 2018. Overall, 470 species, 279 genera and 92 families were recorded. Of this total, 11 species are new records for coastal Pará. The families with the greatest number of species are Fabaceae, Cyperaceae, Poaceae, Myrtaceae, Rubiaceae, Asteraceae, Apocynaceae, Polygalaceae, Convolvulaceae and Melastomataceae, which correspond to 52% of the species. Cyperus, Eugenia, Rhynchospora, Eleocharis and Ipomoea are the most representative genera. For life forms, herbs and shrubs are predominant. Dune fields, restinga forest and herbaceous swamp are the phytophysiognomies with the greatest number of species. A comparison with restingas of northeastern Brazil showed that the flora surveyed is most similar to that of Maranhão, since many species of the Amazonian flora also occur in restingas in this state.

RESUMO: Leguminosae possui grande importância para a caracterização das formações vegetais das restingas amazônicas e a tribo Phaseoleae nas restingas do litoral paraense é considerada uma das mais representativas das Leguminosae. O estudo envolveu análise de material oriundo de coletas e exsicatas dos herbários MG e IAN. Foram registradas 10 espécies, para as quais foi elaborada uma chave taxonômica, descrições, distribuição geográfica, comentários e ilustrações. Entre estas, Clitoria laurifolia Poir., Dioclea guianensis Benth., Erythrina amazonica Krukoff e Mucuna pruriens (L.) DC. são novos registros para as áreas estudadas. O gênero mais representativo é Clitoria (2 spp.), sendo Centrosema brasilianum (L.) Benth. a espécie mais comum.ABSTRACT: Leguminosae has a great importance in the formation of the vegetation and characterization of the Amazon sand coast. The Phaseoleae tribe at Para coastal sandbanks of is considered the most representative Leguminosae's tribe. Botanical material from new collections and specimens from MG and IAN herbaria were analyzed. A total of 10 species were found and a taxonomic key, descriptions, geographic distribution, comments and illustrations were prepared to them. Among them, Clitoria laurifolia Poir., Dioclea guianensis Benth., Erythrina amazonica Krukoff e Mucuna pruriens (L.) DC. were new records to the study areas. The genus Clitoria was the most representative (2 spp.), and Centrosema brasilianum (L.) Benth. was the most common specie in the areas.

Leguminosae é dominante nas formações vegetacionais amazônicas; e, nesse contexto, o arquipélago de Marajó possui destaque, pois inclui várias dessas formações. Este trabalho objetiva fornecer uma listagem das espécies de Leguminosae registradas no arquipélago de Marajó e analisar a sua distribuição geográfica. Analisaram-se dados de herbários, literatura e coletas, e a partir de então foram definidos os padrões de distribuição. Foram registradas 241 espécies em 80 gêneros as quais seis são novos registros para o Estado do Pará. Os gêneros mais representativos foram Inga, Mimosa, Aeschynomene e Machaerium. A subfamília Papilionoideae apresentou maior número de gêneros e espécies. Jacqueshuberia quinquangulata é endêmica da região estudada. A análise da distribuição mostrou o predomínio de espécies amplamente distribuídas pela América do Sul. O arquipélago, por sua heterogeneidade fisionômica, é um sítio diverso de Leguminosae na Amazônia, com cerca de 30% da flora específica da família no Estado do Pará.

Hymenaea parvifolia Huber: dormancy breaking, morphology of fruit, seed and seedling 1The successful use of native species in conservation actions depends on basic knowledge of their biology, beginning with the identification of regenerating individuals in the field, up to the behavior and development of the species from the early stages of germination. Moreover, seed propagation and germination may be limited by the occurrence of dormancy. The objective of this work was to identify the best method to overcome seed dormancy of Hymenaea parvifolia Huber, besides characterizing the fruits, seeds, post-seminal development and seedlings of naturally occurring specimens in Amazonia. For this, (i) tests for the breakdown of dormancy were performed through thermal, chemical and mechanical treatments; (ii) analyses of their effects on seed germination were made; and (iii) morphology of germinative development of Hymenaea parvifolia was described. The treatments based on sulfuric acid for 15, 25 and 35 minutes were the most efficient in overcoming the integumentary dormancy. However, scarification by grinding is recommended because it had been less impact on the environment. External characteristics and shape of the fruit, seed and epicotyl can aid taxonomy of the genus and identification of its species in the field. In addition, morphological characters of the fruit, seed, germination and seedling were illustrated.