MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



SI 



tures. The prophyll elongated excessively, attaining a length of 8 

 to 50 cm. before it splits for the emergence of the leaves and flower. 

 The second scale attained a length of 4 to 7 cm. and the third about 

 half that length. This test was made in another form by placing 



Fig. II. Arisaema trifhylluin. Normal, with two latera plantlets. 



plants with awakening buds in an exposed situation and covering 

 the buds with a heap of sphagnum to a depth of 30 cm. Similar 

 elongation of the prophyll was made and the bud was not opened 



