426 PLANT DISEASES 



Ascochyta, Lib. — Perithecia generally gregarious on dis- 

 coloured patches on leaves or branches, membranaceous, 

 innate, an apical mouth or pore protruding, compressed- 

 globose; conidia elliptical or elliptic-oblong, i-septate, 

 hyaline or tinged greenish-yellow. 



Ascochyta pisi, Lib., Ex. PI. Ard., No. i2.^Spots 

 subrotund, yellowish with a darker margin, perithecia 

 gregarious, brown, ostioluni protruding; conidia oblong, 

 hyaline, i-septate, 14-16x4-6 /*; extruded in reddish 

 viscid tendrils. 



Septoria, Fries. — Perithecia subcuticular, globoso-lenti- 

 cular, furnished with a pore, laxly membranaceous, typi- 

 cally developed on decoloured areas on leaves ; conidia 

 rod-shaped or filiform, pluriseptate or pluriguttulate, rarely 

 eguttulate, hyaline ; basidia minute. 



Septoria petroselini, Desm., Crypt. France, Exs., No. 

 674.. — Spots brown, then white, determinate, on both 

 surfaces ; perithecia minute, delicately membranaceous, 

 perforated, lenticular, parenchymatous, olive; conidia 

 filiform, straight or fiexuous, 6-io-guttulate or delicately 

 septate, hyaline, 35-40 X 1-2 jn. •».» a|..';. 



Entomosporium, Lev. — Perithecia hemispherico-appla- 

 nata, mouthless, black (spurious ?) ; conidia consisting of 

 two superposed cells, with two or more cells springing 

 from the median septum, all the cells setigerous. 



Entomosporium maculatum, Lev., in Moug. Stirp. Vog., 

 No. 1458. — Perithecia epiphyllous, flattened, imperfectly 

 ostiolate ; conidia 4-celled, 18-20X12 //., hyaline, lateral 

 cells smaller, depressed, with very long setae ; pedicel 

 filiform, 20X1 /a. 



