THE PERENNIAL PSEUDORHIZA 391 



doubtless, also takes place under natural conditions, whenever an 



Fig. 19(3. — Collybia fu.sipc.s. (1) On the right, five fruit-bodies develojiing 

 in 191G from one of several pseudorliizae which liave persisted since 

 the summer of 1915. The 1915 fruit-bodies arose from the persistent 

 (and now iriegiUarly swollen) pseudorhiza of a fruit-body wliich 

 developed in 1914. Tlie pseudorhiza of the 1914 fruit-body is shown 

 attached to a piece of wood wliich was part of a large decaying Beech 

 root. (2) On the left, a living fungous mass consisting prol)ably of 

 a 1914 pseudorhiza and three 1915 p.seudorhizae. It was found in 191(5 

 beneath the groimd attached to a Beech root. Had it been left undis- 

 turbed, it would have given rise, doubtless, to a new set of fruit- 

 bodies. Photographed in August, 191(5, at Kew by Miss K. M. 

 Wakefield. Natural size. 



aerial stipe-shaft dies down and rots away leaving a bare irregular 

 exposed surface at the top of the subterranean pseudorhiza. The 



