On Eibes Cynosbati, R. gracile, R. rotundifoUum, R. divar 

 catum var. irriguum, R.fiondum, R. wa-crispa, R. cereum. 



From the eastern seaboard to Nebraska (Webber), and Montan 

 (Anderson). In Berkeley's Notices of N. A. Fungi (Grevillea I"V 

 p. 158) it is said to occur " on grapes." From what we now know c 

 the limitation of the species, this is probably incorrect. 



This is the common " gooseberry mildew." It has been referre 

 to S. pannosa, but it is sufficiently distinguished by its dense, darl 

 colored mycelium, which is strikingly unlike that of most of th 

 Erysiphece. 



S. EpiloWi, (Link.) 



Erysibe Epilobii, Wnk. Species Plantarum VI, p. 102. 



Podosphara (SphcErotheca) Epilobii, De Bary Beitrage Zur Morph. und Phys. 

 Pilze. Ill, p. 48. 



Amphigenous. Mycelium dense or arachnoid. Perithecia dense! 

 aggregated, small 70-80 /z, cell-walls thin with evident reticulationi 

 appendages not numerous, very distinct, deeply colored, septat 

 simple, slender, 6-11 times the diameter of the perithecium. Asci 

 oval, wall medium. Sporidia usually 8, 15-21 fi long. 



On Epilobivm alpinum and E. coloratum, White Mts. (Farlow 

 Wisconsin (Davis). Conidiiferous specimens, probably of this specie 

 have been collected in Illinois. Apparently rare. 



S. CasUgnei, Lev. 



Synon.: Compare De Candolle Flore Franc. VI, pp. 106-10 

 Wallr. Flora Germanica pp. 753-76. Rabenhorst Deutschl. Kryp 

 Flora I, p. 230 et seq. It seems impossible to separate this speci- 

 from others in the numerous descriptions by these and other author 

 The name, as given above, is found in Ann. Sci. Nat. Ser. Ill, Ton 

 XY, p. 139. Erysiphe Gerardiae Schw. N. Am. Fungi p. 269, at 

 Erysiphefuscata, B. & C. Grev. IV, p. 169 belong to this species. 



Mycelium abundant and persistent or sometimes inconspicuoi 

 occurring on either or both sides of the leaves. Perithecia abundar 

 scattered or somewhat aggregated, small, usually about 75 /i, b 

 varying from 60-100 /i. Texture soft, surface uneven, reticulatio: 

 very large and irregular, 20-30 [i; appendages long, stout, usual 

 colored throughout, but sometimes colorless, flexuous, somewhat unevi 

 in width, more or less interwoven with the mycelium. Ascus rath 

 small, elliptical or suborbicular. Sporidia usually 8, small, a-bo 

 15 // long. 



On Vernonia JVoveboracensis, Erigeron Canadensis, Corec 

 sis aurea, C. aristosa, Bidens frondosa, B. connata, B. cerm 



