A Revision on the Genera Chondrilla and Heteroderis (Asteraceae) in Iran

Two genera chondrilla and heteroderis have been revised in iran. according to flora iranica no varieties of chondrilla juncea is known from iran. in this paper four varieties including var. juncea, var. acantholepis, var. latifolia and var. longifolia are known from iran. var. longifolia is described as a new variety. heteroderis pusilla is devided to five varieties including vars. pusilla, chaetocephala, leucocephala, gymnocephala and khorassanica. var. khorassanica is described as a new variety to the science. the new taxa are illustrated and key to the taxa are given.