14 FUNGUS-FLOE A. 



Subfam. I. ASCOMYCEAE. 

 ASCOMYCES. Mont. & Desm. (figs. 5-9, p. 12.) 



Parasitic on living plants; causing the affected parts to 

 become discoloured and variously blistered or contorted ; 

 ascigerous hyphae ramifying in the tissues of the host, and 

 oivin"; Origin to the asci, which burst through the cuticle and 

 form a continuous bloom on the surface ; asci either spring- 

 ing directly from the hyphae without a transverse septum, 

 or furnished with a transverse septum at some distance from 

 the base, the portion below the septum being called the 

 stem-cell ; asci primarily 8-spored, but in most species the 

 spores produce conidia while yet in the ascus, which then 

 appears as if containing many spores. 



Ascomyces, Montague & Desmaz., Ann. Sci. Nat., Ser. iii., 



vol. x., p. 344; Phil., Brit. Disc, p. 399. 



Tapltrina,} e ,-, 



r, 1 ' > ot authors. 



iLxoascus, j 



A. — Mycelium perennial, spreading through the intercellular 

 spaces of the tissue of the young shoots of infected plants in the 

 spring. 



* Ascus icith a transverse septum near the base, cutting off a 

 stem-cell. 



Ascomyces pruni. B. & Br., Ann. Nat. Hist, n. 1629 ; 

 ser. iv., vol. xvii., p. 145 ; Phil., Brit. Disc, p. 400. 



Asci oblong-clavate, apex somewhat truncate, or sometimes 



dehiscence ; slightly x ; — Fig. 49, ascus and paraphyses of same ; 

 highly x ; — Fig. 50, free spores of same; x 300; — Fig. 51, stylospores 

 of same; X 300; — Fig. 52, Durella connivens, Eehm., group of plants; 

 nat. size ; — Fig. 53, a single plant of same in an expanded condition ; 

 slightly x ; — Fig. 54, ascus and paraphysis of same ; highly x ; — Fig. 55, 

 free spore of same ; x 300 ; — Fig. 56, Biatorella retinae, Mudd, plants ; nat. 

 size ; — Fig. 57, ascus and paraphyses of same ; x 300 ; — Fig. 58, free 

 spores of same ; x 500 ; —Fig. 59, Colpoma quercinum, Wallr., group of 

 fungi on oak branch.; nat. size ; — Fig. 60, sections of same; slightly x ;— 

 Fig. 61, asci and paraphyses of same ; highly x ; — Fig. 62, portions of 

 two spores of same in different stages of development; x 750. 



