198 British Fungi. 



rons^ produced at the apex of the promycelium ; 

 general investment of spore-clusters well developed_, 

 brown. 



Boassansia sagittarisef Fischer, in Berichte Deutsch. 

 botan. Gesell. ii. p. 405 (1884) ; Sacc. Sjll. vii. ii. n. 

 1842; Plow. Brit. Ured. and Ustilag. p. 295; Cke. 

 Micr. Fung. ed. 4, p. 227. 



Physoderma sagittarise, Fckl. Fung. Rhen. n. 

 1519. 



On Sagittaria sagittifolia. Xot common. 



Doassansia comari, De Toni and Mass. 



Sori gregarious or scattered, blackish when dry, 

 1 — 1*5 mm. diameter; resting-spores broadly elliptical, 

 10x7 fi, smooth, pale brown with vinous tinge; 

 general integument of spore-clusters well developed, 

 cellular, brown. 



Doassansia comari, De Toni and Massee, revis. of 

 Boassansia in Journal of Mycology, 1888, p. 18; 

 Sacc. Syll. vii. ii. n. 1852. 



Protomyces comari, Berk. Ann. Nat. Hist. n. 1708; 

 Sacc. Syll. vii. i. n. 1 135. 



On leaves o£ Comarum palustre. Rare. 



Forming gregarious or scattered, usually elongated 

 pustules on both surfaces of the leaves. 



Tuburcinia, Fries. 



Sori black, flattened or slightly bullate, often 

 broadl}^ expanded ; resting-spores of uniform size, 

 aggregated in clusters; germination by the formation 

 of a slender promycelium which forms primary sporidia 



