366 PLANT DISEASES 



ampelicida Engelm.). — Conceptacles innate, subglobose, 

 mouth piercing the matrix ; spermatia hyaline, cylindrical, 

 slightly constricted at the centre, I'S X 'S ;«, borne on very 

 slender conidiophores. Germination unknown. 



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

 ceptacles indistinguishable from those of the spermogonia; 

 conidia hyaline, eUiptical, variable in size, 6-9 X 3-4 /^. 



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 /x; spores 8, continuous, hyaline, slightly 

 obovate, 12-15x6-7 /u; paraphyses absent. 



Spores i-septate, hyaline. 



Spbaerella, 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. 



Spbaerella 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 /u, diam. ; 

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

 constricted, hyaline, 15x3-4 /x. 



Conidia {Ramularia tulasnei, Tul.). — Conidiophores 

 springing in tufts from the whitish, bordered spots ; conidia 

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

 in size, 20-50X2-5-4 /i, hyaline. 



Spermogonia. — Conceptacles resembling the peritliecia in 

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

 myriads of ovoid spermatia about 3 /t long. 



