366 PLANT DISEASES 



ampelicida Engelm.). — Conceptacles innate, subglobose, 

 mouth piercing the matrix; spermatia hyaline, cyUndrical, 

 sHghtly constricted at the centre, i"5 X "5 /x, borne on very 

 slender conidiophores. Germination unknown. 



Pycnidia { = Fho7na uvicola, Berk, and Curtis). — Con- 

 ceptacles indistinguishable from those of the spermogonia ; 

 conidia hyaline, elliptical, variable in size, 6-9 X 3-4 /x. 



Perithecia. — These are the conceptacles of the Phoma 

 stage, which produce asci the following season ; asci 

 clavate, obtuse, narrowed below, straight or slightly curved, 

 65-70X10-11 /a; spores 8, continuous, hyaline, slightly 

 obovate, 12-15x6-7 /j. : paraphyses absent. 



Spores i-sephite, hyalijie. 



Sphaerella, Ces. and De Not. — Perithecia membran- 

 aceous, subglobose or depressed, covered by the epidermis 

 or erumpent, mouth indented or shortly papillate ; asci 

 8-spored ; spores elongated, i -septate hyaline, or very 

 slightly tinged : paraphyses absent. 



Sphaerella fragariae, Sacc, Syll.^ ii. p. 505. — Perithecia 

 gregarious, often circinating, globose, black, innato-erump- 

 ent, seated on pale spots surrounded by a purple ring 

 previously occupied by the conidial form 90-130 /x diam. ; 

 asci oblong, 8-spored, 40 /x long; spores i-septate, slightly 

 constricted, hyaline, 15 X 3-4 /x. 



Conidia (^Raimdaria tiilasnei, Tub). — Conidiophores 

 springing in tufts from the whitish, bordered spots ; conidia 

 narrowly elliptic-oblongs continuous, or 1-3-septate, variable 

 in size, 20-50 x 2*5-4 /x, hyaline. 



Spermogo7iia. — Conceptacles resembling the perithecia in 

 form, rather smaller, and mixed with the latter, containing 

 myriads of ovoid spermatia about 3 /x long. 



