296 



RESEARCHES ON FUNGI 



C. macrorhiztis, C. niveus, and C. Rostrwpianus, all of which are 

 heterothallic.i 



Coprinus macrorhizns (Fig. 128) often comes up on heating 



straw-manure, and 

 then it develops a 

 rooting base or pseu- 

 dorhiza. It differs 

 from C. 7iarcoticus, 

 C. sfercorarius, and 

 C. niveus in its pileus 

 being covered with 



loose fibrous matted 



\ ■ B^M r' Wr^SJIk ^^^^^^ consisting of 



^^%^ I'^H^Hm B^^^^'' chains of elongated 



«yK M "^^(SIvvfl^HlyR^d^M cells, instead of with 

 I ^^1 ■ ^H WM ^^I^^^^^HB squamulose 



I 1 S ■ ^K ^m ^^^^Hl^l meal consisting of 



^^^ta. Kl- pi ^^ V ^^^^H^^l spherical cells. It 

 ^^■- V'SI^ ^m W JH^M^IH degrees with C. lagopus 



^ 1 Y ■ -W i^^^^^^m Vol. II, Fig. 20, p. 



71) in having fibrous 

 scales on the pileus, 

 but differs from this 

 species in having a 

 stouter stipe and 

 pileus, broader gills, 

 smaller spores and, 

 especially, as may 

 be seen in the field, 



in its gills, during spore-discharge, being interlocked by cystidia 



instead of being free. 



Coprinus picaceus (Fig. 129) is a beautiful species which I have 



seen growing in England at Taunton, Keswick, and near Birmingham. 



^ These sexual reaction.? were all determined in my laboratory ; those of 

 C. macrorhizus and C. Rostrupianus by Miss Dorothy Newton, the other five by 

 Miss Irene Mounce. The problem of sex in the genus Coprinus will be fully treated 

 of in vol. iv. 



Fig. 128. — Coprinus macrorhizus. Mature fruit- 

 bodies shedding spores, growing on stable 

 manure. The one on the extreme right lias its 

 pseudorhiza in view. Photographed at Birm- 

 ingham, England. Natural size. 



