8o RESEARCHES ON FUNGI 



intermingling of the hyphae of the two species took place, so that the 

 scion did not wither. After a few days the stipe feebly elongated, 

 the pileus partially expanded, and collapse soon followed without 

 the shedding of any spores. The expanded and collapsing fruit- 

 body is shown at G. There is no evidence that food materials 

 passed from the bulb of Coprinus sterquilinus to the stipe and 

 pileus of Coprinus lagopus. This attempt at making a graft 

 cannot therefore be said to have been successful. At H is shown 

 the method by which another experiment was carried out. The 

 young pileus of a fruit-body of Coprinus sterquilinus (cf. E) was 

 first removed. Then two small slits were made in the bulb, and 

 the upper parts of two young fruit-bodies of Coprinus narcoticus 

 were placed in them. At H the bulbous base of C. sterquilinus 

 is represented in vertical section attached to a ball of manure. 

 The hyphae of the bulb enveloped the inserted stipes. One of 

 the young scions withered without undergoing any further develop- 

 ment. The other succeeded in elongating its stipe to the length 

 of about an inch and in opening an abnormally small pileus, but 

 its dwarf appearance indicated that it had received from the stock 

 to which it was attached little or nothing more than a supply of 

 water. At I, the two scions are the tops of young fruit-bodies 

 of Coprinus narcoticus (to the left) and Coprinus lagopus (to the 

 right), and at J the scion is the upper part of a young fruit-body 

 of Coprinus echinosporus, 1 while the stock in both I and J is a bulb 

 of Coprinus sterquilinus. In another experiment, not here repre- 

 sented by a Figure, a very rudimentary pileus (like that at E) of 

 Coprinus sterquilinus was cut off and placed on the stump of a 

 young stipe of Coprinus echinosporus. In all these experiments 

 no successful union took place. The grafting failed. The hyphae 

 of the scions and stocks grew together somewhat, and the scions 

 remained fresh-looking for two or three days ; but the scions 

 eventually died without growing any larger. In the last com- 

 bination attempted (pileus of Coprinus sterquilinus on stipe of 

 Coprinus echinosporus}, the scion kept its fresh appearance for 

 five days, although after that time it began to wither. It is clear 



1 For a description of this new species, vide A. H. R. Buller, " Three New British 

 Coprini," Trans. Brit. Myc. Soc., vol. vi, Part IV, 1920, p. 363. 



