A DisKASK OF Currant Canes. 



35 



13 



stems. By October first, many of the branches had produced large numbers 



of the fruit-bodies with mature spores (Fig. 3, r. ). These resembled in 



nearly every detail the 

 specimens of Pleon- 

 ectria berolinensis , 

 Sacc.in Ellis and Ever- 

 hart's North American 

 Fungi, No. 470. 



The perithecia are 

 minute, smooth; 

 spherical or p e a r- 

 shaped bodies, and are 

 usually borne in clus- 

 ters closely crowded 

 together. The color is 

 brick-red or reddish- 

 brown, bright when 

 the plants are fresh, 

 but duller when dry. 

 Each cluster is usually 

 seated upon a more or 

 less distinct stroma, 

 but seldom, if ever, is 

 this a cushion of Tu' 



berciilaria. Most of the specimens examined seem to be nearly sessile upon 



the wood, but an evident stroma is shown in Fig. i 



beneath the bark, but as they 



grow older and larger, they -,- 



break through and appear on 

 the surface, bordered by the 

 ruptured edge of the epidermis. 

 Occasionally, several clusters are 

 joined side by side, forming a 

 ring extending nearly around 

 the stem. In some instances, 

 when the bark had been torn 

 away, the perithecia are not 

 clustered, but entirely distinct 

 and superficial on the wood. In 

 such cases there is no evidence 

 of an underlying stroma, cer- 

 tainly none of Tubercularia. 

 When fresh the perithecia are 

 swollen out and nearly spherical; 

 but when old and dry, the apical 



Longitudinal section of a cluster of peritJiecia 

 of Pleonectria, 



The clusters originate 



14. 



Longitudinal section of a single peri- 

 theciutn of Pleonectria. 



