186 Phragmidium Rosaceae. 



ROSACEAE. 



Rubus. 

 122. Phragmidium barnardi Plow, and Wint. 



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

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

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



O. Spermogonia on numerous, minute, discoloured patches on uppe 

 surface of leaf, appearing as ruby coloured, minute, blister-like 

 puckered swellings, with round central pore, and arranged in 

 small concentric circles. 



Spermatia golden-yellow in mass, hyaline individually, minute, 

 narrowly ellipsoid, embedded in mucilage, 4-6 x 2J-3 p. 



TI. Uredosori scattered on under surface of leaf, corresponding to 

 spots on upper surface, very irregular in outline, ochraceous, 

 also sparingly on upper surface of leaf, usually on veins, ellipsoid 

 to elongated ellipsoid, surrounded by ruptured epidermis, and 

 in colour. 



Uredospores globose or ellipsoid, epispore thick, warty, dai 

 yellow, 17-19 p diarn. or 21-26 X 17-19/u; paraphyses surroi 

 ing them, at first colourless, finally yellowish-brown, variously ai 

 peculiarly shaped, generally curved and pointed at apex, 30-40 

 9-12 p. 



III. Teleutosori scattered or gregarious, minute, dark brown, n< 

 rarely confluent, pulverulent. 



Teleutospores at first intermixed with uredospores, golden-browi 

 cylindrical, equal, rounded at apex, sometimes with a shoi 

 hyaline, conoid apiculus, 6-9 septate (8 very common), constrict 

 at septa, smooth, usually two germ-pores on one face in each 

 or three altogether, 60-115 x 23-28 p ; pedicels hyaline, cyl 

 drical, or a little inflated, sometimes uniseptate towards base, vei 

 long, up to 207 x 10-19 p. 



On living leaves of Native Raspberry (Rubus parvifolius L.). 



Victoria Alps near Bright, Arthur's Creek, Flinders, Kill 



Murramurrangbong Ranges, Myrniong, near Melbourn 



Phillip Island, Seymour, &c. 

 South Australia Mount Lofty (Tepper 2 ). 

 Tasmania Huonville, Jan., 1892 (Rodway 1 ). Mount Wellin 



Jan., 1892 (Rodway). 



As early as 1886 this species was determined by Plowright and Win 

 from specimens sent by that veteran microscopist, Mr. F. Barnard, K 

 Victoria. 



The teleutospores occur on the same leaves as the uredospores, and they 

 germinate on the living plant immediately on ripening. The germ-pores in 

 each cell may be seen very clear and distinct. There are two in each seen 

 on one face, situated laterally anpl immediately below each of the septa, and 

 by means of careful focussing it can be seen that there is one behind, thus 

 making three in each cell. In the apical cell there are also two just above 

 the septum, and a third may also be seen as in the other cells. 



Dietel n remarks that there is only one germ-pore in each cell of this 

 species, but, as indicated above, three can usually be seen with such dis- 

 tinctness that they are capable of being photographed, as shown in the 

 Figures. 



