268 TJie Scottish Naturalist. 



ridia oblong or ovoid, n-15 by 4-5 (Saccardo gives 

 them as 15-20 by 7-8, minutely 2-3-guttulate ; basidia 

 about half as long. 

 *20o. G. umbrinellum B. & Br., 3731, C.621 (Cooke's Hand- 

 book, No. 1412); no earlier record as Scotch. 

 On fallen leaves of Quercus Robur (Oak), in Autumn. 

 Dee (Aberdeen). 

 *2oi. G. Betulae (Lib.), Mont., 2733 ( D - & R - Trail, Sc. Nat., 

 1887, p. 40). 

 On dying leaves of Betula alba (Birch), common in 

 autumn near Aberdeen. 

 Dee. 

 Spots often nearly circular, turning brownish or dark brown; 

 pustules on the upper surface of the leaves, dark brown, 

 numerous, at last erumpent, tearing the epiderm; sporidia 

 cylindrical-clavulate, obtuse, 6-12 by 2 (Saccardo gives 

 13-16 by 2), hyaline. 



XL. Cylindrosporium Unger. 



Pustules subcutaneous, discoid or ill-denned ; sporidia filiform, 



often flexuous. 

 This "genus " chiefly consists of the conidial stage of species 

 of Entyloma, a genus of Ustilaginew. 

 *202. C. Ficarise Berk., 3848, C.631, M.i 186 (belongs to Enty- 

 loma Ranunculi Bon.). 

 Common on living leaves of Ranunculus Ficaria. 

 Tay, Dee, Moray. 

 (I cannot distinguish C. Ranunculi Bon. from this, and believe 

 that the two belong to the same species, though enume- 

 rated by Saccardo and by Cooke as distinct. Sacc. 3850, 



C633). 

 ^203. C. niveum B. & Br., 3849, C.639, M.1189 (D. Fergusson, 

 R. Berkeley and Broome, 1875). 

 On living leaves of Ca/tha palustris. 

 Dee (local but common). 

 ^204. C. Oxalidis Trail, Sc. Nat., 18S7, p. 89. 



On living leaves of Oxalis Acetosella, in September. 

 Dee (near Aberdeen). 



^205. C. rhabdosporum B. & Br., 3860, C.635, M.1188 (D. 

 Stev nson, R. Berkeley & Broome, 1875). 



