144 Bulletin 313 



IsARiopsis CLAVISPORA (B. & C. ) Sacc* — On tlie leaves of grape. 

 Causes large irregular spots similar to mildew spots which become 

 dr\- and oclire-colored. Conidiophores densely fasciculate, filiform, 

 ochre-colored, septate, apex wavy, 50-200 x 4-5 fi ; conidia elongate, 

 obclavate, attenuate at apex, olivaceous to ochre-colored, 1-3 septate, 

 50-70 x 7-8 IX. 



846. Part of infected grape leaf. 847. Conidiophores, 1/6. 848. Conidio- 

 phores and conidia, 1/12. 



TuBERCULARiA VULGARIS Tode. (= Nectria cimiaharina Fries., 

 page 34). 



TuBERCULiNA PERSiciNA (Ditm.) Sacc. — On Puccinia s"^. Sporo- 

 dochium globose- depressed, often arranged in a circular manner, 

 dark-violet color ; conidia globose, 7-8 fx, rarely 10 ju, in diameter, rose 

 to violet-colored; sporophores simple or branched, septate, apex 

 smooth or denticulate, hyaline. 



849. Sporodochium growing on a rust, 2/3. 850. Conidiophore, tips of 

 conidiophores with conidia, 1/12. 



VoLUTELLA Buxi (Cda.) Berk. — On the twigs and elaves of Buxus 

 sempervirens. Causes spots on the under side of the leaves, dying of 

 parts and often of the entire plant. Sporodochia grouped, minute, 

 sessile, cushion-shaped; setae hyaline to faint rose-colored, obtuse, 

 septate apices, erect, diverging and surrounding the sporodochium; 

 sporophores fasciculate, acute at apex, hyaline, 15-20 x 2.5 ju.. Coni- 

 dia oblong, fusoid, hyaline to rose-colored, 10 x 3.5-4.5 /x. 



851. Infected leaf of boxwood. 852. Sporodochia, conidiophores, conidia 

 and bristles, 1/6 and 1/12. 853. Conidia, 1/12, from three different sources. 



*Syn. Cercospora viticola (Ces.) Sacc. 

 Cereospora vitis (Lev.) Lind. 



