1 88 



Plirag midium Rosaceae . 



Massee 3 from an examination of fresh material comes to the conclusion 

 that it is not a Phragmidium nor a ffamaspora, although he does not under- 

 take the responsibility of forming a new genii?. 



Dietel 8 , 10 , on the other hand, considers that there are no substantial 

 grounds for separating this species from Phragmidium, although he recog- 

 nises a resemblance to Gymnosporangium in the arrangement and structui 

 of the teleutospores. 



(Plate XXXI., Fig. 272.) 



Acaent 



124. Phragmidium potentillae (Pers.) Karst. 



Karsten, Fung. Fenn., No 94 (1868). 

 Winter, Rev. Myc. VIII. , p. 208 (1886). 

 Cooke, Handb. Austr. Fung., p. 339 (1892). 

 Sacc. Syll. VII., p. 743 (1888). 

 [I. Caeomata arranged in circular groups, often confluent, orange yellow 

 to reddish. 



Caeomospores crowded in a short series, globose, ovate or ellipsoid, 

 echinulate, 17-24 x 14-19 p.] 



II. Uredosori hypophyllous, orange-red, roundish, scattered 01 

 gregarious, often confluent, surrounded by a crown of club-shaj 

 paraphyses. 



TJredospores spherical, elliptical or ovate, yellowish, echinulat 

 17-24 x 14-20 p, average 18 x 15 p. 



[III. Teleutosori orbicular, black, pulvinate, minute. 



Teleutospores oblong, 2-6 septate (usually 3-5), slightly coi 

 stricted, obtuse, or obtusely apiculate above, slightly attenuat 

 below, smooth, yellowish-brown, 50-70 X 20-22 p ; pedicel 

 colourless, firm, 100-150 p, long.] 



On living leaves of Acaena sanguisorba Yahl. 



Victoria Near Melbourne, 1886 (Reader). (Winter. 2 ) 

 On Acaena ovina A. Cunn. 



S. Australia Sept., 1898 (Quinn). 



The specimen from Victoria was originally determined by Winter, and 

 portion of the same material, kindly supplied by Reader, shows only 

 uredospores. 



Darlucafilum Cast, is plentiful on some of the sori. 



125. Phragmidium subcorticium (Schrank) Winter. 



Winter, Die Pilze L, p. 228 (1884). 

 Cooke, Handb. Austr. Fung., p. 339 (1892). 

 Sacc. Syll. VII., p. 746 (1888). 



I. Caeomata forming large dense swellings on stems, leaf -stalks, and 

 fruits, and lesser swellings on lower surface of leaves, effused, 

 generally confluent, bright orange, with club-shaped paraphyses. 



Caeomospores ellipsoid to ovoid, echinulate, epispore hyaline, and 

 contents orange, 25-29 x 14-20 yu. 



