Sphaerotheca 49 



to subglobose, rarely shortly stalked, 45-9OX 50-72 /^ ; spores 8, 

 20-25 (rarely 30) x 12-18 ft, averaging 22 x 15 //. 



Hosts. — Agrinionia Eupatoria, AlcJieniiUa m-zuiisis^ A. vulgaris^ 



Collomia gracilis, C. hctcrophylla, C, Vpicaris^ Dipsacns 

 D, syhestris, Epilolmtm adenocaulon, E, alpiunm^ E, ccph 



/ 



pannflonim, E. parviflonwi X rosaini^ E, pub 



Erodium moschatum, Fragaria glauca, Gcniniuni cacspitosnin, G. 

 Caroliniamim, G. Ibcricnm, G. incisitm, G, maculatum, G. Nepa- 

 lense, G. palnstn\ G. pratcnse, G. Richardsomi, G, syhaticinn, 



w 



Geum album, G. Kokiviicum, G. macrophyllum (265), G. strictum, 

 G. Virginianuin, Gilia arishila, G. hcierophyUa, G. linearis, Humii- 

 liis Japoniais, H. Liipuhis, Morina pcrsica, Neillia opulifolia, Phlox 

 longifolia, Potcntilla Anserina, P. bifurca, P. Comanim, P.fragari- 

 oides, P. glanditlosa, P. palusfyis, P. rcptans, P. Tormcntilla, Potc- 

 rium Canadoise and var. nicdiuvi, P. officinale and ^•ar. canieum, P. 

 SitcJicnse (cult.), P. tenuifolium and var. album, Pyrus Aria, Rhus 

 copallina, R. glabra, R. ty plana (60) (282), Ribcs pridum, Rosa 

 Arkansana, R. blanda, R. lucida, R. Woodsii, Rubus Canadensis, R. 

 hispidus, R. odoratus, R. spcctabilis, R. strigosus (60), R. triflorns, 

 Scabiosa Cancasica, Shcphcrdia argentea, S. Canadensis, Spiraea 

 Ar uncus, S. Camtschatica, S. salicifolia (163), S. Thunbergii, S. Ul- 

 maria, Viola Canadensis, V. canina var. sylvcstris. 



Distribution.— ¥.\.\vo^q: Britain, France, Spain and Portugal 

 {77), Belgium, Netherlands, Switzerland, Italy, Germany, Austria- 

 Hungary, Denmark, Norway, Sweden, Finland, Russia. Africa : 

 Algeria. Asia: Transcaucasia {Z3?>), Turkestan, Siberia (Minus- 

 sinsk), Japan. North America : United States— Maine (163), New 

 Hampshire (124), Massachusetts, New York, Pennsylvania, New 

 Jersey, Virginia, South Carolina, Ohio, Michigan, Indiana, Ala- 

 bama (12), Tennessee, Illinois, Mississippi, Wisconsin, Missouri, 

 Iowa, :\Iinnesota, South Dakota, Nebraska, Montana, Wyomin 

 Colorado, Utah, California, Washington, Canada, Newfoundland, 

 New Brunswick, Ontaria. 



or 



- Var. fuliginea (Schlecht) 



Alphitomorpha fidiginca Schlecht. Berl. Ges. Nat. Freund. 

 Verh. I ; 47. 18 19. 



^ ^^ 



