The present work purpose to accomplish a morphologic study on the fruit and the seed of Attalea maripa (Aubl.) Mart. Two hundred fruits were collected from three different trees at the University Campus in Manaus - AM. One hundred fruits were used for morphometrical studies and 30 for extracting the embryo and making the morphological characterisation of the seed. ?Seed? consists of the joining of the endocarp with the almond. The fruit measures in average, 5.23cm in length and 2.59cm in diameter; its shape is usually ovoid; the pericarp presents a fibrous epicarpo and mesocarp constituted of fibrous mucilaginous material. The seed presents a variation in shape and size, measuring in average 3.84cm in length and 1.77cm in diameter and has mean weights of 6.62g of fresh matter and 5.75g of dry matter, which corresponds to 12.8% of humidity. The endocarp is completely adhered to the tegment, the of hard consistensce, thick; it may or not present septs, originating from uniloculed, biloculed or triloculed, ovaries forming fruits with one, two and three almonds respectively, being the ones from the two former types the most frequent. The almond is oblong shaped, when single, or presenting different shapes and sizes, when in
number of two or three. The seed coat is, externally, strongly adhered to the endocarp and, internally, to the endosperm; thin, with narrow marked grooves corresponding with the branches of raphe; the micropyle is observed in the basal end, protected by an operculum. The endosperm is solid, occupying almost the whole almond. The embryo which is curve shaped milky-white coloured with the peripheral region wider than the internal, measuring in average, 0.65cm in length and 0.24cm in diameter is found immersed in the endosperm.