66 A Monograph of the Ervsiphaceae 



Schles. 3 : 230. 1893 ; Jacz. Bull. I'Herb. Boiss. 4 : 

 Oudem. Rev. Champ. Pays-Bas. 2: 82. 1897. 



1896; 



Podosphacm pannosa de Bary, Beitr. Morph. Phys. Pilz. i : 



xiii., 48. 1870. 



P 



1892. 



Gen. Plant. 3^: 44 



Exsicc: Desmaz. PI. Cr. Fr. ed. i : sen i : 404; Baxt. Stirp. 

 Crypt. Oxon. fasc. 2 : 92 ; Lib. PI. Crypt. Ard. fasc. i : 80 : 

 Cooke, Fung. Brit. Exsicc. 90, ed. sec. 589 ; Rab. Fung. Eur. 

 2214; Rehm. Ascom. 796; Fckl. Fung. Rhen. 725 ; Berk. Brit. 

 Fung. 96; *Rab. Herb. Myc. ed. 2: 459; Wahrlich. Parasit. 

 Pilze. 3 1 (in Herb. Hort. Imp. Petropol.) ; * Syd. Myc. March. 



4514; *Erikss. Fung. par. scand. 33 ; * Seym. & Earle, Econ. 

 Fung. 131b. 



Mycelium persistent, forming on the stem, calyx, petiole, and 

 rarely on the midrib at the back of the leaf, dense satiny patches 

 at first shmmg white, but often becoming gray, dingy buff, or rarely 

 pale brown, composed of densely interwoven special hyphae 

 which are about 6 [i wide, sparingly branched, somewhat rigid re- 

 fractive and thick-walled, with the lumen becoming obliterated • 

 perithecia more or less (usually completely) immersed in the per- 

 sistent mycehum, globose to distinctly pyriform, 85-120 « in 

 diameter, usually about 100 /^ cells obscure, about 10 « w'ide • 

 appendages few, often obsolete, very short, tortuous, pale brown' 

 septate; ascus broadly oblong to globose, 88-115 /A averaging 

 100x60-75//; spores S, 20-27 XI 2-15 ;a 



Hosts.— Pnams Persica, Rosa alba (95), R. arvcnsis, R. canwa, 

 R. centifolm, R. cinnamomea (99), R. davtasccna, R. dumetorum 

 (319), R- Eglanteria (290), R. Gallica, R. glauca (319), R, pomi- 

 fera, R. riibigbwsa (319), R. tomcntosa, R. vilhsa. 



i9/.y//7^;///^//.-- Europe.— Britain, France, Portugal (395), 

 Spain (— ), Belgium (14) (209), Netherlands (i), Switzerland 

 (176;, Italy, Germany, Austria-Hungary (20) (43) (95), Den- 

 mark, Norway, Sweden, Russia. 



Asia— Cyprus, Transcaucasia (338), India (85). 



AUSTR.ALIA.— Queensland (89), Victoria, New South Wales 

 and Queensland (225). 



North America.— United States : Tennessee, Illinois (probably 

 in many other states, but has been generally confused with 5. 

 hamdi ). 



