The Scottish Naturalist. 185 



Analyatical key to genera. 



A. Pycnidia scattered, (smooth) 



B. Sporidia not enclosed in mucus. Diplodia. 



BB. Sporidia enclosed in mucus. Macrodiplodia. 



AA. Pycnidia clustered into groups on a stroma. Botryodiplodia. 



XL Diplodia Fr. 



Generic character as above. 



59. D. JEsculi Lev. 1837, Cooke in Grevillea 1885, p. 36. 



Sporidia ellipsoid, obtuse, constricted in middle, biguttulate, 

 sooty brown, 22-24 by 8. 



Tweed (Jerdon). 



England, Europe. 



60. D. Padi Brun. 1885. 



Under the name D. vulgaris Lev. there stands in Mycolo- 

 gia Scotica (No. 1109) a fungus found "on twigs of Primus 

 Padus," by Rev. Dr. Keith, at Forres. D. vulgaris grows on 

 stems of herbs ; and it seems more probable that the fungus 

 belongs to D. Padi. The latter is described in Saccardo's 

 Sylloge as having pycnidia i( scattered, minute, black, innato- 

 erumpent, sporidia oblong, with the ends rounded, i-septate, 

 constricted, sooty brown, 22 by 8-10, upper cell thicker; 

 basidia hyaline." Occurs in France. 



61. D. consors >B. and Br., 2019, C. 236, M. mi (D. and R. 



Stevenson). 

 On dead leaves of Prunus Laurocerasus (Cherry Laurel not 

 the true Laurel). 

 Tay (Glamis). 

 *62. D. Rhododendri Bell. 2027 (D. & R. Trail, Sc. Nat. 1887, 



p. 90). 



On dead spots on leaves of Rhododendron, near Aberdeen, 

 in autumn. 

 Dee. 

 Pycnidia on lower surface of spots, like scattered black dots, sub- 

 dermal, nearly hemispherical, papillate, sporidia oblong or 

 ovoid, 16-21 by 9-1 1, somewhat constricted in the middle, 

 dark brown. 



Belgium, France. 

 63. D. arbuticola (Fr.) Berk. 2028, C 240, M. 112 (D <fc R. 

 Cooke). 



