GLOMERELLA 175 



Ascigerous condition. Perithecia buried in the black 

 stroma; asci clavate, 8-spored; spores hyaline, continuous, 

 17-20 X 8-9 /J.. 



Conidial form. Minute conidia contained in cavities in 

 the stroma. During summer care should be taken that the 

 disease is not introduced into the garden on briar stocks. 

 If it occurs on cultivated roses these should be cut away 

 below the disease ; but sometimes it extends underground, 

 in which case the plant should be removed and burned. 



Massee, The Rose Annual, 1909 (there called Bys- 

 sosphaeria diplodia by mistake). 



Willow canker. Professor Johnson has described a 

 canker of willow rods caused by Botryosphaeria gregaria 

 (Sacc). The skin of the rod at the infected points looks as 

 if it had been scorched, it dries up, turns brown, and becomes 

 cracked ; at a later stage the skin peels off more or less, and 

 exposes the cracked wood. The rods snap at the diseased 

 spots, and are rendered useless for basket-making. 



Ascigerous form. Perithecia gregarious, globose, black ; 

 asci clavate, 8-spored, with paraphyses ; spores oblong- 

 ovoid, hyaline, 30-40 X 6-8 fi. 



Conidial stages are also present. 



Care should be taken not to plant diseased sets from an 

 infected source. 



The land should be well drained to avoid stagnant water 

 and sour soil. It should also be well manured. 



Johnson, Set. Proc. Roy. Dublin Soc, 10, p. 153 (1904). 



GLOMERELLA, Spauld. and Schrenk (=Gnomoniopis, 



Stoneman, not Berlese) 



Perithecia caespitose, or more or less compound and 

 immersed in a stroma, with which they often form an evident 

 hard cushion ; asci, oblong to clavate, 8-spored, paraphyses 

 absent ; spores oblong, usually slightly curved, continuous, 

 hyaline. Permanent stage of Gloeosporium like fungi. 



Gloeosporium is palmed off as being the conidial condition 

 of so many different ascigerous fungi nowadays ! 



