The seed germination process and seedling development were studied for Polianthes geminiflorn (Lex.) Rose var. geminiflom, Polianthes sp . and P. longiflom Rose. The seed viability test estimated was from 94 to 100%. In seeds treatment by soaking the seeds in water at 25ºC during three, six and twelve hours, the germination percentage, velocity and germination uniformity were increased like control assay. On the other hand, P geminiflorn var. geminiflora. were more resistent than Polianthes sp. and P.  longiflora. seeds to a treatment of three, six and twelve hours in water a t 40ºC. The three species had epigeal germination and their cotyledon developed a haustorium. None of this species exhibited seed dormancy and they were orthodox. There were significant differences in the first leave length between the three species. The seed morphology, germination behavior and seedlings development were very similar.