P TRENOMYCETES. 



293 



■ascus contains eight ovate ascospores, wliicli are two-parted, 

 ^s is the case in many other members of this order (5, 

 Fig. 200). The ascospores escape through a pore in the top 

 of the ascus, and in from three to five days begin to ger- 

 minate by sending out a tube or small hypha ; sometimes 

 two or more hyphse start out from a single ascospore (6, 

 Fig. 200). 



388. — Besides the perithecia, there are other cavities 

 found which much resemble them, but which contain other 

 supposed reproductive bodies. In one kind are found the 

 stylospores, which are quadrilocular oval bodies, borne on 

 long stalks (2, Fig. 200) ; they occur generally in definite 



Pig. 200.— Eeprodnctive organs of Sphmria mrrrbom. 1, conidia-bcaring hyphse 

 ^rom a section of the knot on the cherry, made in May ; 2, stylosport^s ; 3, outline of 

 a vertical section of a perithecium, made in winter; 4, two apci. with the contained 

 ascospores, enlarged from 3 ; p, paraphyses ; 5, a ripe ascospore ; 6, two ascospores 

 in process of germination. AH muchmagnified.— Alter Farlow. 



patches on the walls of the globular cavities above men- 

 tioned. Their function is unknown ; but in all probability 

 they are asexual reproductive bodies. In other perithecium- 

 like cavities slender filaments are produced ; these are the sper- 

 matia, and the cavities in which they occur are the sperma- 

 gonia. Still other cavities, much like the preceding, " are 

 lined with short delicate filaments, which end in a minute 

 oval hyaline body ; " these small bodies are produced in 

 immense numbers ; when they are discharged from the cavi- 

 ties in which they grow, they ooze out in long jelly-like 

 masses. The cavities are called pycnidia, and the small 



