ASC05IYCES. 15 



rounded, 40-50 x 10-13 //., stem-cell 14-18 x 8 fi; spores 

 hyaline, continuous, smooth, 5" 5-6 "5 X 4^4*5 fi. 



Exuciscus pruni, Fckl., Enunier. PI. Nassov., p. 29 ; Winter, 

 Krypt.-Flora, Gymnoasceae, p. 5, fig. 3, p. 4 ; Sacc. Syll., 

 viii., n. 0342 ; Frank, Krankh. der Pflanzen, p. 524, fig. 89. 



Causing peculiar deformations on the young fruit of the 

 plum, sloe, and bird-cherry. 



Type specimen examined. 



Ascomyces buUatus. Berk., Intr. Crypt. Bot., p. 284, 

 fig. 66, c ; PhU., Brit. Disc, p. 401. 



Tufts at first small and isolated, soon running into each 

 other ; covered at first by the epidermis which is raised in 

 blisters ; asci narrowly clavate, 35-40 x 8-9 /x, stem-cell 

 nearly cubical, about 8 /x across; spores variable, globose, 

 ovate or broadly elliptical, hyaline, continuous, smooth, 4—5 /j. 

 diameter. 



Oidium hullatus, B. & Br., Journ. Hort. See, ix., p. 51, 

 with a fig. 



Exoascus liuUatus, Fckl., Symb. Snppl. ii., p. 49 ; Sacc, 

 Syll., n, 3343 ; Winter, Krypt.-Flora, Gymno., p. 5. 



Forming blisters on living leaves of pear and hawthorn; 

 spring. 



Type specimen examined. 



Ascomyces deformans. Berk., Intr. Crypt. Bot, 

 p. 234; Berk., Outl., p. 370, t. 1, fig. 9, a, b; Phil., Brit. 

 Disc, p. 401. (figs. 8, 9, p. 12.) 



Developing on the under surface of the leaf, and forming 

 scattered swollen places which become powdered with white 

 meal; asci subcylindrical, 40-50 x 7-8 fj., stcm-ceU 12-16 ju, 

 long, up to 5 /A thick at the apex, and narrowing down- 

 wards; spores continuous, hyaline, elliptical, smooth, 7 x 

 3-4 /i. 



Exoascus deformans, Fuckel, Symb., p. 252; Winter, Krypt.- 

 Flora, Gymno., p. 6; Sacc, SyU., viii. n. 3341; Sadeb., 

 Exoasc, p. 114, fig. 19. 



Type specimen examined. 



Causing the disease known as " curl " in leaves of peach 

 and apricot; also forming the dense fasciculation of small 

 branches called "bird's nests" or "witches' besoms," in the 

 plum, cherry, and bird-cherry. 



