VARIOUS OBSERVATIONS 



79 



macrorhizus. What Weir therefore seems to have done is to have 

 succeeded in grafting two very closely related species of Coprinus 

 upon one another. I have not attempted to confirm his particular 



KJ3&.A HEaM.B WBfeg....c D..:.!? 



FIG. 25. Experiments upon grafting. A and B, two young 

 fruit-bodies of Coprinus sterquilinus. Both were decapi- 

 tated by cutting in the direction shown by the dotted 

 lines, and the upper parts were interchanged. C shows 

 the bulb of A with the pileus of B set upon it. D, the 

 same combination three days later : the scion and stock 

 have become perfectly united and normal growth is taking 

 place ; the constriction in the bulb indicates the plane 

 of union. E, a young fruit-body of Coprinus sterquilinus. 

 A young fruit-body of Coprinus lagopus (= C. fimetarius} 

 was set upon E after decapitation as shown at F. G is 

 F two days later : the union has] not been completed, 

 but the scion has expanded to some extent. H, two young 

 fruit-bodies of Coprinus narcoticus set in slits in a decapitated 

 bulb of Coprinus sterquilinus attached to horse dung. I, 

 to the left a fruit-body of C. narcoticus, and to the right one 

 of C. lagopus (= C. fimetarius) set on a decapitated bulb 

 of C. sterquilinus. J, a young fruit-body of Coprinus 

 echinospoms set on a decapitated bulb of C. sterquilinus. 

 The unions in H, I, and J were unsuccessful, but in H 

 one of the fruit-bodies finally elongated its stipe and 

 partially expanded its pileus. All natural size. 



experiments but, on the contrary, have sought, as opportunity 

 presented itself, to cause a union between two distantly related 

 species. The nature of the experiments can best be elucidated 

 by reference to Fig. 25. At E is a young fruit-body of Coprinus 

 sterquilinus. Its rudimentary pileus was decapitated and a young 

 fruit-body of Coprinus lagopus, the stipe of which had been 

 cut transversely, was set upon its bulb, as shown at F. An 



