UROMYCES SPP. ON MEDICAGO AND TRIFOLIUM SPECIES IN IRAN
In the framework of study on rust fungi of Fabaceae and based on the study of herbarium and newly collected specimens, six Uromyces species are recognized on Medicago spp. and Trifolium spp. from Iran. Among these species, U. fallens is recorded as new member for the Iranian rust flora. U. striatus is recorded as main causal agent of rust on lucerne (Medicago sativa) in Iran. Moreover, U. trifolii-repentis is recorded as main rust species on Trifolium spp. in Iran. The species concept of U. trifolii which, has been used in different senses in previous studies on Iranian rust fungi, is discussed. U. teheranicus which has been recorded as an endemic rust species on Trifolium sp., from Iran is considered as a synonym for U. trifolii-repentis. New host plants and new localities are recorded for recognized rust species in. A key to the identified Uromyces species on Medicago spp. and Trifolium spp. is also given.
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