Mycological Bulletin 



NOS. 65-66 LIBRARY 



NEW YORK 



IV. A. Kellermau, Ph. D., Ohio State University 



'Columbus, September, 1906 



BOTANICAL 



A WORD OR TWO BY THE EDITOR. 



Our coadjutors who have made it possible to issue a very 

 interesting Number have our special thanks — and others are also 

 urged to make contributions in the way of short articles, notes, 

 specimens, and photographs. 



The note on Spore discharge of Bulgaria is interesting, and 

 others will doubtless test the conclusion which O. E. Jennings 

 h'ls announced, namely, that the factor inducing it is alternate 

 expansion and contraction of the spore bearing surface, due to 

 varying degrees of heat, and that a varying moisture content can. 

 Lt least, be of but secondary importance. 



In Mushroom Literature we have given much space to the 

 nice work of Gertrude E. Douglas on the rate of growth of one 

 of the common mushrooms. Much is said by people on "Mush- 

 room Growth," yet I think little exact knowledge can be claimed. 

 Mies Douglas has set an example for others to imitate in this 

 matter. We continue also to press Professor Atkinson into 

 service — but kis book on Mu.'^hrooms is full of good things and 

 wc therefore do not ])romi;-e to refrain from "copying" again 

 in the future. These suggestions on the uses of mushrooms should 

 b,- read the second time. 



Ik'sides acknowledgments for other assistance, it is quite 

 a]Ji)ropriate to call special attention to the excellent picture of 

 I'olyi^orus umkellatus the photograph of which was kindly fur- 

 nished bv Ered Mutchler, of Clark l^niversity. 



A NOTE ON THE DISCHARGE OF SPORES TN BULGARIA RUFA. 

 Otto E. Jennings. Carnegie Muscidu. 



In connection witli a note in Torreyai by Mr. C. C. Hanmer. men- 

 tioned recently m the Mycolofrical Biilletii\~ a few remarks upon the man- 

 ner of spore-discharge in Bulgaria nifa Schweinitz may lie of possible 

 imerest. 



Mr. Hanmer says in the note referred to that "I have upon numerous 

 occasions observed the momentary cn pulsion of spores from fungi such 

 a" Bulgaria rufa and Sarcoscypha floccosa, but with these plants the spore 

 discharge seems to occur when they are first touched, and then only." 



In early July, Mrs. O. E. Jennings collected a fine specimen of 

 Brlraria rufa in rich, swampy woods, rear my father's home in north- 

 ern Ohio. Returning from the woods about the middle of the after- 



'.\ note regarding the Discharge of Spores of Pleurotus ostreatus. C. 

 C. Hanmer. Torreya, 5: 140-147. August, 1905. 



-Notes from Mushroom Literature, I. W. A. Kellerman. ^Mycological 

 rrlletin, 4: :2;i4-2:!fi. June, 1906. 



