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Host or range extensions are given for Plasmopara crustosa, Asperisporium peucedani, Cercospora angelicae, C. selini-gmelini, Didymaria platyspora, Passalora depressa, Ramularia archangelicae, R. heraclei, Cylindrosporium heraclei, Phleospora osmorhizae, Septoria aromatica, S. levistici, S. oenanthis, Puccinia angelicae, P. bupleuri, P. coelopleuri, P. ligustici, P. marilandica, P. pimpinellae, and P. jonesii. The following new taxa and new combinations are presented: Plasmopara carlottae sp. nov. on Conioselinum pacificum, Ramularia glehniae sp. nov. on Glehnia littoralis ssp. leiocarpa, R. terrae-novae sp. nov. on Ligusticum scothicum, Puccinia grenfelliana sp. nov. on Conioselinum chinense, P. pimpinellae ssp. carlottae ssp. nov. on Osmorhiza chilensis, and O. purpurea, P. jonesii ssp. asperior comb. nov., P. cymopteri ssp. oregonensis ssp. nov., P. cymopteri ssp. traversiana comb. nov., and P. lindrothii ssp. sphalerocondra comb. nov. Host nomenclature is revised where necessary. Some implications of biogeography and host relationship are presented.