854 Wisconsin Aca< emy of Sciences, Arts, and Letters. 



PR0T0MYCETALE8 



PROTOMYCES FUSC1 S 1'k. 

 On Hepatica triloba 

 acutiluba 



PROTOMYCES ANDINUS Pat. 



On Ambrosia trifida 



artemisiaefolia 

 Btdens frondosa 

 connata 

 cernua 



COMYCETES 



WOMTCETALE 



PERISPORIACEAE 



PODOSPIIAL-:ka OXYACANTHAE iDC.) DBy. 

 On Spiraea salicifolia 



tomentosa 

 Pyrus coronaria 

 Crataegus oxyacantha 



spp. indet. 

 Prunus virg'miana 



pennsylvanica 



pumila 



americana 



spp. indet. (cult.) 



PODOSPHAERA BIUNC1NATA Cke. & Pk. 

 On Hamamelis virginiana 



PODOSPHAERA LEUCOTRICHA (E. & E.) Saim. 



On Pyrus Malus 



SPHAEROTHECA MORS-UVAE (Schw.) B. & 0. 

 On Ribes cynosbati 

 americanum 



