92 Trans. Acad. Set. of St. Louis. 



The latter proposition of Woronin seems to me the correct 

 one. I found the apothecia developing abundantly this 

 spring in Maryland peach and plum orchards ; but in every 

 case so far as I can judge, only from sclerotia in mummified 

 fruits over one year old. 



I first noticed the disk-like apothecia on the ground in an 

 old peach orchard in Charles County, Md., April 10th of this 

 year. Suspecting their origin, I was delighted on digging 

 them up to find them attached to buried peaches. A short 

 search revealed them in large numbers wherever the ground 

 was moist and buried "mummy " peaches had been for some 

 time undisturbed . Two days later I found them in the young 

 peach orchard of the Maryland Experiment Station at College 

 Park, and also on a few buried plums. They were also found 

 in other orchards at College Park, and a week later one par- 

 tially developed apothecium was found in northern Frederick 

 County and on May 8 the dried up remains of many and a few 

 fresh ones were found in Washington County, and one single 

 apothecium was found after long search in the mountains of 

 Garrett County on May 9, where peaches were just then in 

 flower. In no case have I failed to find the cups where 

 Monilia was abundant two years ago, but where it was abun- 

 dant last year and not the year before, I have found none. 

 This may offer some explanation of the appearance of blos- 

 som blight after a season when Monilia was not abundant : 

 however the conidia alone appear able to carry the fungus 

 over one year. 



The apothecia are easily distinguished where perfectly de- 

 veloped, if on open ground, but they are usually found 

 covered by trash. It hardly seems possible that they could 

 appear every year, and not have been found by some of the 

 excellent investigators who have looked closely for them. 

 But it is well known that many fungi, including some species 

 of Sclerotinia mentioned by Woronin, like some flowering 

 plants do not produce certain stages in their life history for 

 years, while on certain other years, these appear in great 

 abundance. 



I estimate from the condition in which I have found the 

 fungus at different places that the first disks appeared at 



