1 86 The Scottish Naturalist. 



On dead leaves of Arctostaphylos Uva-ursi (Bearberry), in 

 Scotland. 



c. On Herbaceous Dicotyledons. 



*64. D. obsoleta Karst. 2045, C. 244, S.M. 3034 (D. k R. Trail, 

 Sc. Nat. 1885, p. 128). 

 On dead stems of Solatium tuberosum (Potato). 

 Dee (near Aberdeen). 

 D. vulgaris Lev. 2065, C. 245, M. 1 109. 

 See remarks under D. Padi. 



65. D. herbarum Lev. 2066, C. 246, M. mo (D. White, R. 



Stevenson). 

 On stems of herbaceous plants. 

 Tay (Perth, Glamis). 



XII. Macrodiplodia Sacc. 



Pycnidia rather large ; sporidia covered with mucus. 



66. M. Ulmi Sacc. 2090, C. 250 (R. Cooke, in Grevillea, 1887.) 



On branches of Ulmus (Elm). 

 Tweed (Jedburgh). 



XIII. BOTRYODIPLODIA SaCC. 



Pycnidia clustered on a stroma, erumpent, sub-carbonaceous. 



67. B. sphaeroides (Fr.) Sacc. 2120, C. 257, M. 1107 sub 



Dothiora sphceroides (D. Jerdoii), 

 On dead branches of Fraxinus excelsior (Ash). 

 Tweed (Jedburgh). 



4. HyalodidymjE Sacc. 



Pycnidia as in Hyalosporae ; sporidia oblong or ovoid, 2-celled 

 (one cross septum), hyaline or yellowish. 



Analytical key to genera. 



A. Pycnidia usually in discoloured spots on leaves (lenticular, 



minute ; sporidia not ciliated). Ascochyta. 



AA. Pycnidia not in discoloured spots. 



B. Pycnidia adnate to a radiating web-like subiculum on leaves. 



Actinonema. 

 BB. No subiculum. 



C. Often parasitic on Uredines ; sporidia tipped at each end with 



a hyaline appendage. Darluca. 



