بازنگری جنس علف هفت‌بند Polygonum L. sensu lato در ایران

The genus polygonum l. is reviewed based on the literature and available herbarium materials. a. synopsis and identification key based on recently division of the polygonum sensu lato to 3 different genera: polygonum l. sensu sticto, bistorta adans. and persicaria mill. are provided to the ca. 45 accepted taxa. in addition, the checklist of accepted species and synonyms including selected studied specimens are given. furthermore, polygonum iranicum which has been collected from fars province is described as a new species from iran. persicaria salicifolia which has been collected from khuzestan province is reported as a new species record from iran.