Resumo. ABSTRACT Platymiscium floribundum Vog., a forest species belonging to the family Fabaceae, has great potential for economic exploitation and can be used both in landscape and in reforestation, in the restoration of degraded areas and permanent preservation.given its importance, this work was, it was aimed to study the influence of light and temperature on seed germination of Platymiscium floribundum . We evaluate the germination and vigor Under constant and alternate temperatures of 25 and 30 0 C in different light regimes: White (LB), green (LV), red-far (LVD), red (LV) and absence light (A). The experimental design was completely randomized in a factorial 3 x 5 with four replications of 25 seeds. The variables analyzed were: germination, first count of germination, germination speed index (IGV), length and seedling dry weight (root length, shoot length of seedlings). The seeds of Platymiscium floribundum express their maximum force in illuminated environment independent of the temperature.