MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



151 



buds being formed on the rootstocks which could not be awakened 

 in the dark room. 



Fig. 1 10. Podophyllum peltatum. ^, stem bearing flowers and two leaves; B, 

 peltate leaf. Normal. 



Polystichum acrostichoides (Michx.) Schott. 



Clumps of Polystichum acrostichoides were brought in from the 

 open, and forced in the dark room in February at the New York 

 Botanical Garden. The fronds soon developed long upright stipes 

 along which were borne the pinnae tightly rolled in clumps. Much 

 of the excessive elongation took place in the basal portion, which at- 

 tained three times its normal length. The sporogenous tissues at the 



