160 



short, flexuous. Tips short, subulate, widely spreading. 

 Conidia broadly obovate, violet-colored, 22— 24|U by 15—20 /u. 

 Oospores large, 38 — 45 (i in diameter, brown, exospore 

 more or less rugose. 



On Claytonia virginica. 



Peronospora Arthuri Farlow. Conldiophores rather 

 short and rigid, several times dichotomous. Tips rather short 

 and rigid. Conidia broadly ellipsoidal, obtuse, 22—26 fi by 

 19 (i, slightly violet -colored. Oospores large, dark brown, 

 34 — 42 (U in diameter, exospore covered with short blunt 

 papillae. 



On Oenothera biennis. 



Peronospo.'ra sicyicola Trelease In litt, Hau- 

 storia not seen. Conidiophores slender, axis long and flexuous, 

 with very numerous 3— 4 pinnate, slender, horizontal branches, 

 alternately or frequently oppositely placed. Tips divided 

 into several, usually three, very short spines. Conidia small 

 13 — 17 fi by 11—15 fi ovoid, white. Oospores? 



On Sicyos angulatus. 



Peronospora Illinoensis Farlow. Conidiophores 

 slender, scattered, loosely 2—3 pinnate above, secondary 

 branches usually horizontal, sometimes secund. Tips acute, 

 short, erect, clustered. Conidia globose, or ovate -obtuse, 

 white, 17-20 f* hy 15-18 (i. Oospores? 



On Parietaria pennsylvanica. 



Peronospora Lophanthi Farlow. Conidiophores 

 very slender, long', naked below, above repeatedly dicho- 

 tomous, divisions flexuous. Tips flexuous, forcipate, one 

 division usually considerably longer than the other. Conidia 

 small, globose, or ovate-obtuse, 19—22 ^ by 15 — 20 ft, 

 violet-colored. Oospores? 



On Lophantus scrophulariaefolius. 



Erwahnt wird noch das Vorkommen von Peronospora 

 vitieola auf Ampelopsis und dasjenige einer Form auf Geum, 

 die vielleicht zu P. Potentillae gehort. ^ 



G. W 



Soeben erschienen! 



Anzeig: 



Rabenhorstii Fungi europaei et extraeuropaei c 



Dr. G. Winter. 



Cent. 31. 32. 



Rabenhorstii Bryotheka europaea et extraeurop 



cura Dr. G. Winter. 



Fasc. 28 et 29. No. 1351-1450. 



Redaction 

 Dr. a. Winter in Leipzig. 



Druck und Verlag 

 von C. Heinrlch in Dresden. 



