Seed size and dormancy level were studied in 20 trees from two populations of
Schizolobium parahyba
to
evaluate how these characteristics occurbetween and within populations, and whether seed germination
was affected by its morphometry. These two populations are located in the coastal (Paraty) or mountain
(Miguel Pereira) regions in the state of Rio de Janeiro, Brazil. The seed morphometrictraits (length,
width, thickness and weight) were measured. Germination with or without seedcoatdormancy treatment
(mechanical scarification) wasassessedbya randomized emergence test in nursey. All morphometric traits
differed significantly among individuals and between populations. The trees from the mountain region
showed a larger seed size and a lower dormancy level than that of trees from the coastal region. Seed size
had no effect on seed germination or seedling development. Climate influence on the determination of
germination behavior is discussed based on the results.