248 



Rennert : Teratology of Arisaema 



phyllum, and A. Dracontium. No description of these deforma" 

 tions has yet been published. One of these examples is a flower- 

 i ng stalk of Arisaema triphyllum, in'which the spathe is abortive, 

 being represented only by an irregular rudimentary scale on the 

 axis some distance below the pistils (Fig. I, E\ The spadix of this 

 specimen has too confluent stigmas not represented in the drawing. 



^ 



««* 



•i« t* 



&t»fr 



} r 



M 



N 



Fig i. 



Fig. 2. 



Fig. I. Teratological formations of Arisaema tripkyllum. C, inflorescence with 



umn 



Fig. 2. Teratological formations of Arisaema. M, 



Ni 



hooked apex. 



In this case the stigmas on two adjacent ovaries are removed from 

 their normal central position, to one at the side where the broad 

 tops of their ovaries are in contact and their stigmatic surfaces are 

 confluent. As neither is at all diminished in size, the united stigmas 

 present a broad elliptical surface. The ovaries which bear these 

 united stigmas are entirely distinct, however. The sterile portion 

 of the spadix, although rather long and thick, is normal. 



