124 



BUTANY AND riiARMACUGNOSY 



verse section of it, it is o1)serve(l that the ovules are borne upon 

 the part which projects from the concrescent margins into the 

 cavity, this part being known as the placenta, and the united 

 margins of the carpel forming the " inner " or ventral suture. 

 In the syncarpous gynsecium the ventral suture of the carpels is 

 directed toward the axis of the flower ; in some cases that portion 



Fig. 79. Pistils and different kinds of stigmas. A, simple (monocarpellary) pistfl 

 of willow with lobed stigma; B, compound pistil of Fourcroya with head-like stigma; C, 

 longitudinal section through flower of Spondias with five separate styles and stigmas, 

 only three of which are shown; D, flower of Peperomia showing bristly stigma; E, recurved, 

 thread-like stigmas of the Upas-tree (Antiaris); F, flower of a Canary grass showing the 

 tw(i simple plumose stigmas; G, pistillate flower of couch grass showing the two compound 

 plumose stigmas; H, thread-like stigmas of pistillate inflorescence of Eitchlar.a one of 

 the grasses; J, tri-parted stigmas of the pistillate flower of the castor-oil plant; K, L, 

 two forms of stigmas of Begonia. After Engler. 



of the carpel corresponding to the midrib is very prominent, as 

 in the Papilionatse, and has received the name of " outer " or 

 dorsal suture. 



There are as many locules in the ovary as there are carpels, 

 and the walls or partitions between the locules of a syncarpous 

 gynsecium are known as dissepiments; when three or more 



