The relationship between seed coat micro-morphology characteristics and systemic evolution of some species of Iris

Micro-morphology characteristics of ten species,one variation and one outgroup species of Iris were studied,also discussing the relationship between the micro-morphology of seed surfaces and the evolution of Iris.The results showed that seed coat micro-morphology had the stable characteristics,which was not relative to the distribution zone.The characteristics of concave and convex surface micro-morphology of a species were different significantly.Therefore,we should choose the same spot of the seeds for comparison observation.All of species were reticulate grain(reticulate grain or negative net grain).Micro-morphology characteristics can be used to classify genus and series of genus,but not for variations.The characteristics of micro-morphology of seed surfaces were very important for classification and systemic evolution of Iris.