424 BROOKLYN BOTANIC GARDEN MEMOIRS 
each while others were borne singly on sprouts one to three centi- 
meters long and were of considerable size. 
The formation of new tubers directly from old ones in this manner 
is so common as to attract little attention. The unusual features of 
the present case were: (1) The large size of the new tubers. Many 
of them had a weight of 25-30 grams, several of 50-60 grams, and 
one weighed 67 grams. (2) The formation of new tubers within old 
Fic. 2. A new tuber protruding from a slit at the bud end of an old seed tuber. 
Nat. size. (Compare Fig. 3.) 
ones. Fifteen of the old tubers had large new tubers protruding from 
slits in their sides (Figs. 1-2). In one instance a new tuber weighing 
about 28 grams was wholly included within the parent tuber. This, 
like most of the protruding new tubers, was considerably flattened 
by the pressure to which it had been subjected during its growth. 
This phenomenon of large new tubers within old ones was a sight 
calculated to excite wonder in the beholder. To the mycologist it 
suggested the bursting of the volva in the egg stage of the phalloids. 
