362 



Mycologia 



On living leaves of Clematis ligusticifolia Nutt., Billings, 

 Mont., Aug., 1913, E. T. and E. Bartholomew 5180. Type col- 

 lection, Fungi Columb. 5084. 



45. Ramularia Ranunculi-Lyallii Dearn. & Barth. sp. nov. 



On the upper side of the leaf, small, irregularly-oblong spots 

 mark the diseased parts. These bear on the lower side numerous 

 acervuli of short sporophores supporting subfusoid, hyaline, con- 

 tinuous conidia, 15-22X2.5-4^; and finally becoming a dense, 

 white mould-like layer. These spots may become confluent and 

 the whole lobe or leaf sered. 



On Ranunculus Lyallii (Gray) Ryd. Bremerton, Wash., July, 

 1912, E. Bartholomew. Victoria, B. C, April, 191 5, John 



Macoun. 



46. ( ?) Cercosporella Aceris Dearn. & Barth. sp. nov. 



Extensive areas, dark-brown above, reddish-brown below, 

 surrounded as seen when held up to the light by a greenish, trans- 

 lucent border, 1-2 mm. wide. Tufts of hyphae and sporules 

 whitish, numerous, superficial, epiphyllous, consisting of long, 

 slender, straight, hyaline, septate sporules 1 50-200 X 4 /*, inter- 

 mixed with thick, short, septate hyalin offshoots from the same 

 base, 15-50 X 6-10 p. 



Destructive to living leaves of Acer macrophyllum Ph., Ducka- 

 bush, Wash., Aug., 1912, E. Bartholomew 481J. Type collection, 

 Fungi Columb. 5005. 



47. ( ?) Cercosporella Alni Dearn. & Barth. sp. nov. 



Slightly discolored areas sometimes extending over the whole 

 leaf, hardly visible on the lower side unless held up to the light 

 but well marked on the upper side by the numerous, whitish 

 or yellowish tufts of hyphae and spores. These superficial tufts 

 or masses consist of hyaline, straight, 2-5-septate sporules, 270- 

 360 X 5-6 /x, intermixed with hyaline, relatively short offshoots 

 30-100 X 10-20 fx from the same base of globular or quadrate 

 cells, 9-14^. The second form may develop into the first named, 

 long, straight sporules. The oldest masses seem yellowish, waxy 

 tubercles supporting numerous, long, hyaline sporules. 



Destructive to living leaves of Alnus rubra Boug., Bremerton, 

 Wash., Sept., 1912, E. Bartholomew 4924. Type collection, 



