392 



FUNGOUS DISEASES OF PLANTS 



Chrysomyxa Rhododendri Picea excelsa 



(De C.) De Bary (Norway spruce) 



Cronartium Ribicola Pinus strobus (white 



Fisch. de Waldh. pine) 



Coleosporium Senecionis Pinus sylvestris 



Pers. (Scotch pine) 



Melampsora tremulceTvU. Pinus sylvestris 



(Scotch pine) 



Rhododendron ferrugi- 



neum 

 R. hirsutum 

 Ribes spp. (currant, 



gooseberry) 

 Senecio vulgaris 

 S. sylvaticus 

 S. viscosus, etc. 

 Populus tremula 



(poplar) 



Opsiautouredo (Stages O, I, III) 



Hosts 



Puccinia Tragopogi Pers Tragopogon spp. (salsify) 



Opsiheterouredo (Stages O, I, III) 



0,1 

 Pyrus Malus (apple) 



Hosts 



III 



Gymnosporangium ma 

 cropus Lk. 



Gymnosporangium globo- 

 sum Farl. 



Gymnosporangium Sabi- 

 na (Dicks.) Wint. 



Gymnosporangium clava- 

 riceforme (J acq.) Rees 



Juniperus virginiana 

 (red cedar) 

 Pyrus coronaria (wild J . virginiana (red cedar) 

 crab) 



Pyrus Malus (apple) 



Pyrus communis 



(pear) 

 Pyrus americana 

 Cydonia vulgaris 



(quince) 

 Pyrus communis 



(pear) 

 Crataegus tomentosa 



J. virginiana (red cedar) 



J. virginiana (red cedar) 



J. virginiana (red cedar) 

 J. virginiana (red cedar) 



J. Sabina 



J. communis (common 

 Juniper) 



Brachyautouredo (Stages O, II, III) 



Hosts 



Puccinia Hieracii (Schum.) Mart. . Hieracium spp. 



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



Hemiuredo (Stages II, III) 



Hosts 

 Uromyces Caryophyllinus (Schrankj 



Wint. . Dianthus Caryophyllus (carnation), etc. 



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



