202 British Funoi. 



■d> 



cluster at first iuvolvcd in a gelatinous integument ; 

 promjcelium filiform^ sporidia unknown. 



Sorosporlum, Rudolphi in Linna3a^ iv. (1829)^ p. 

 116; Sacc. Syll. vii. pt. ii. p. 511 ; Plow. Brit. Ured. 

 and Ustilag. p. 296. 



Readily distinguished by the dense spore- clusters 

 consisting of numerous small resting-spores of equal 

 size and functional value. 



The true position of the present genus is somewhat 

 uncertain owing to imperfect knowledge in respect to 

 the formation of the primary sporidia. 



Sorosporium sai^onaricBi Rud. (figs. 109, 110). 



Sori pale rufous-brown^ becoming coarsely pulveru- 

 lent^ produced in the inflorescence during the bud 

 stage j spore-clusters subglobose or elliptical, 40-100 

 11, consisting of numerous resting-spores loosely 

 coherent ; resting-spores globose, broadly elliptical, 

 or irregularly angular from mutual pressure, ochra- 

 ceous, the free side covered with minute warts or 

 irregular, elongated ridges, 18 x 10-14 fi ; pro- 

 mycelium filiform. 



Sorospoi'inm saponarice, Rudolphi, Linna^a, iv. 

 (1829), p. 116; Sacc. Syll. vii. ii. n. 1872; Plow. 

 Brit. Ured. and Ustilag. p. 296. 



In the flowers (ovary, stamens, &c.), rarely the 

 uppermost leaves of Dianthus deltoides, Sap07iaria 

 officinalis, Silene iwflata. Rare. 



Sorosporium scabies, Fisch. de W. (figs. 59, 59a). 



Stiii forming large, olive, scab-like expansions ; 

 spore-clusters globose or elliptic-oblong, the resting- 



