io8 British Fun^i. 



CysfopnSy Lev. Ann. Sci. Nat. ser. iii. vol. viii. p. 

 371 (1847); Cke. Hdbk p. 324; Sacc. Syll. vii. p. 

 233. 



The minute white or yellowish sori at first covered 

 by the epidermis, and then, bursting through, with 

 the crowded gonidiophd es, bearing each a terminal 

 cbain of gonidia, characterize the present genus. 



Cystopus candidus. Lev. (figs. 99, 100, 127, 128). 



Sori white, erumpent, form variable, often broadly 

 expanded and confluent, gonidia all similar, white, 

 globose, 10-16 /JL diameter ; oospores subglobose, 

 35-45 /JL, epispore yellowish brown, or sometimes 

 dark brown, with coarse warts which sometimes pass 

 into irregular, wavy ridges. 



Cystopus candidus, Lev. Ann. Sci. Nat. ser. iii. 

 vol. viii. p. 371 ; Cke. Hdbk. n. 1564, fig. 214; Sacc. 

 Syll. vii. n. 792 ; Cke. Micr. Fung. pi. x. figs. 198 

 —209 and 205—207. 



On various cruciferous plants, especially shepherd's 

 purse, Capsella hursa-pastoris ; appearing on the 

 stem, leaves, pedicels, fruit, &c., forming rather bullate 

 or inflated white patches of variable extent, which 

 produce distortion of the parts attacked. All the 

 gonidia produce zoogonidia. Very common. 



Cystopjus tragopogoniSi Schroet. 



Sori irregularly globose or oblong, compressed, 

 often concentrically arranged, white ; terminal 

 gonidium larger than the rest, depresso-globose, 

 usually umbilicate below, wall thick, yellowish or 

 colourless, sterile ; remainder of gonidia shortly 

 cylindrical, wall colourless, furnished with a trans- 



