To probe into systematic position of Hypericum elatoides,we studied seed macro- and micro-morphology of 9 species from 5 sections in the genus Hypericum L..The result shows the evident divergence in seed morphology among different sections.Seeds of Sect.Ascyreia are relatively longer and thinner.Testa sculpturings are long rectangular reticula.Seeds of Sect.Roscyna are thicker.Testa sculpturings are polygonal reticula of approximately identical length and width.Seeds of H.sampsonii (Sect.Sampsonii),H.perforatum (Sect.Hypericum) and H.petiolulatum subsp.yunnanense (Sect.Elodeoida) are all smaller in size,but their testa sculpturings are quite different.H.sampsonii has areolate reticula;H.perforatum has circular reticula with spaces in neighbor reticula;H.petiolulatum subsp.yunnanense has double reticula.Seed morphology of H.elatoides is similar to that of Sect.Roscyna.Therefore,evidence from seed morphology suggests that systematic position of H.elatoides is in Sect.Roscyna.