76 Bulletin 313 



curved, hyaline, non-septate; pycnospores subcylindrical, somewhat 

 acute, non-septate, 2-, occasionally 3-guttulate, hyaline, 5-8 x 2- 

 2.8 /a; stylospores filiform, curved, rarely straight, 13-28 /x long. 



424. Pycnidium, 2/3. 425. Cross-section of same, 2/3. 426. Pycnospores, 

 1/12. 427. Stylospores, 1/12. 



DoTHiORELLA MORI Bcrl. — On the twigs of mulberry. Causes 

 cankers and a dying of the twigs. Pycnidia grouped, imbedded in 

 the stroma, scarcely papillate, dark ; conidiophores broadly filiform, 

 hyaline, guttulate, 28-30 x 3-4 /x ; spores ovate to oblong, walls thick, 

 guttulate, hyaline, non-septate, 19-28 x 15-16 /x. 



428. Cross-section through stroma showing pycnidia, 2/Z. 429. Spores, 1/12. 



DoTHiORELLA sp. (= Botryosphaeria ribis G. & D., page 62). 



Sph^ropsis cydoni^ C. & E.— On the leaves and twigs of Cydo- 

 nia japonica. Causes reddish-brown leaf spots and twig cankers. 

 Pycnia immersed and punctiform ; spores, brown, elliptical, 20-22 x 

 9 ju,. We fotmd what appeared to be the same species on Amelan- 

 chier. We believe that this is S. malorum. 



430. Spores from Cydonia japonica, 1/12. 431. Spores from Amelanchier 

 sp., 1/12. 



Shp^ropsis juniperi Peck. — On the bark and leaves of Jimi- 

 perus stricta. Pycnidia, black, grouped, erumpent, many small 230- 

 275 fx in diameter, spores oblong or ellipsoid, 20-23.5 x 11.5-13.5 fx. 

 Also reported on /. virginiana. 



432. Spores, 1/12. 



SPH.EROPSTS MORI Bcrl. — On twigs of mulberry. Causes small 

 cankers. Pycnidia sparse, or somewhat grouped, dark, globose, 

 embedded in a fissure, collapsing, short ostiolum, conical, 1/3-1/2 

 mm. in diameter; basidia hyaline, short and rather broad; spores 

 oblong-ovate, base attenuated, deeply olivaceous, 15-18 x 10-2 /*. 



433. Spores, 1/12. 



Sph^ropsis rubicola C. & E. — On raspberry canes. Causing 

 cankers. Pycnidia dark, subgregarious, erumpent, invisible until 

 exposed by the splitting of the epidermis; spores brown, oblong, 

 elliptical, 25-30 x 10 /x. 



434. Spores, 1/12. 



Sph^.ropsis staphyle^ Brun. — On twigs and fruit pods of 

 Staphylea trifolia. Causes cankers and spots. Pycnidia scattered, 

 minute, globose; spores ovoid or oblong, brown, continuous, 20-30 

 X 9-11 fi. 



435. Infected seed pod. 436. Spores, 1/12. 



