392 FUNGOUS DISEASES OF PLANTS 



Chrysomyxa Rhododendri Picea excelsa Rhododendron ferrugi- 



(De C.) De Bary (Norway spruce) neum 



R. hirsutum 

 Cronartium Ribicola Pinus strobus (white Ribes spp. (currant, 



Fisch. de Waldh. pine) gooseberry) 



Coleosporium Senecionis Pinus sylvestris Senecio vulgaris 



Pers. (Scotch pine) S. sylvaticus 



S. viscosus, etc. 



Melampsora tremulcz^ul. Pinus sylvestris Populus tremula 



(Scotch pine) (poplar) 



Opsiautouredo (Stages O, I, III) 



HOSTS 

 Puccinia Tragopogi Pers Tragopogon spp. (salsify) 



Opsiheterouredo (Stages O, I, III) 



HOSTS 

 O, I III 



Gymnosporangium ma- Pyrus Malus (apple) Juniperus virginiana 

 cropus Lk. (red cedar) 



Pyrus coronaria (wild J. virginiana (red cedar) 



crab) 



Gymnosporangium globo- Pyrus Malus (apple) J. virginiana (red cedar) 

 sum Farl. 



Pyrus communis J. virginiana (red cedar) 



(pear) 



Pyrus americana J. virginiana (red cedar) 



Cydonia vulgaris J. virginiana (red cedar) 



(quince) 



Gymnosporangium Sabi- Pyrus communis J. Sabina 



na (Dicks.) Wint. (pear) 



Gymnosporangium clava- Crataegus tomentosa J. communis (common 

 riceforme (Jacq.) Rees Juniper) 



Brachyautouredo (Stages O, II, III) 



HOSTS 



Pucc'inia Hieracii (Schum.) Mart. . Hieracium spp. 



Puccinia suaveolens (Pers.) Rostr. . Cirsium arvense (Canada thistle) 



Hemiuredo (Stages II, III) 



HOSTS 



Uromyces Caryophyllinus (Schrank; 



Wint Dianthus Caryophyllus (carnation), etc. 



Uromyces scutellatus (Schr.) Wint. Euphorbia spp. (spurges) 



