42 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



and roots had formed two large branches of a corm-like struc- 

 ture. The apices of these branches were crowned with long buds 

 curved apogeotropically, and containing a young leaf. The failure 

 of the scape to reach light from the opposite, upper surface, may 

 have stimulated the formation of these leaf buds from the lower side. 

 The scape shows an exaggerated elongation, in conformity with 

 the fact that it must find its way up to the light unaided under all 

 circumstances. The soundness of the corm after the first growth in 

 darkness suggests that it might be capable of long-continued exist- 

 ence without light after a manner more fully described in the discus- 

 sion of Arisaema. 



Apios Apios (L.) MacM. 



Tuberous stems of Apios were placed in the dark chamber on 

 February 14, 1900. These specimens had remained in the soil in 

 the open during the preceding winter months and the shock of the 



Fig. 4. Etiolated stems of Afios Afios. 



