Poraqueiba paraensis Ducke, known as "mari", is an Amazonian fruit tree used for urban forestry. Basic information on floristic identification, seed production technology, biology and the production of mari seedlings are incipient. The objective of the present work was to describe the morphology of the fruit and seeds, the post-seminal development and evaluate the seedling emergence of P. paraensis. The evaluations were examined by stereo and optical microscopy and electron microscopy scanning for the morphoanatomical description. The fruits are drupaceous, oblong to elliptical, monospermic, succulent, indehiscent and with non-articulated peduncle. The fruit dimensions are approximately 7.0 cm in length, 4.0 cm in width and 69.5 g of fresh mass. The seeds are albuminous, oblong-elliptical with smooth tegument, brown color, membrane-cartaceous, with longitudinally visible raphe, circular micropyle and circular hilum. The seed dimensions are approximately 6.9 cm in length, 3.5 cm in width and 53.4 g of fresh mass. The germination is epigaeous phanerocotylar, with opposite foliaceous cotyledons, paracitic stomata in the abaxial face of the leaves and rare tricome in the limb nervure. Removing the epicarp and mesocarp of the fruit does not influence the emergence of Poraqueiba paraensis Ducke seedlings.Key words: fruit; seed; germination; Icacinaceae Aspectos morfo-anatômicos do fruto, semente e desenvolvimento pós-seminal e emergência de plântulas de mari (Poraqueiba paraensis Ducke) RESUMO: Poraqueiba paraensis Ducke, conhecido como mari, é uma árvore frutífera amazônica utilizada para a silvicultura urbana, mas para a identificação florística e a tecnologia de sementes, as informações básicas sobre a biologia e a produção de mudas mari são incipientes. O objetivo no presente trabalho foi descrever a morfo-anatomia do fruto, sementes e desenvolvimento pós-seminal e avaliar a emergência de plântulas de P. paraensis. Para a descrição morfoanatômica de tento, os frutos, as sementes e as plântulas foram avaliados por meio de estéreo-microscopia, microscopia óptica e eletrônica de varredura. Os frutos são drupáceos, oblongos a elípticos, monospérmicos, suculentos, indeiscentes, com pedúnculo não articulado, com aproximadamente 7,0 cm de comprimento, 4,0 cm de largura e 69,5 g de massa fresca. As sementes são albuminosas, oblongoelípticas, com tegumento liso, cor marrom, membrano-cartáceos, com rafe longitudinalmente visível, micropila circular e hilo circulares, em que suas dimensões são aproximadamente 6,9 cm de comprimento, 3,5 cm de largura e 53,4 g de massa fresca. A germinação é epígea, com cotilédones foliares opostos, estômatos paracíticos na face abaxial da folha e raros tricomas na nervura das folhas. A remoção de epicarpo e mesocarpo do fruto não influencia na emergência de plântulas de P. paraensis. Morpho-anatomical aspects of fruit, seeds post-seminal development and seedling emergence of mari (Poraqueiba paraensis Ducke) PalavrasRev. Bras.
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