PABTIGVLAB TYPES OF FLOWERS, CONTINUED 215 



curious heart-shaped corolla. The stamens Are six. 

 This flower, therefore, is dimerous ; but because 

 of its hypogyuous 

 character and the 

 presence of all four 

 of the floral series 

 (and the character of 

 its fruit), it is evi- 

 dently closer kin to the 

 peas and violets than pig. 208. 



it is to the birthwOrtS. Flowers of the grape. 



247(1. We must not think of these resemblances in plants as 

 necessarily expressing close genealogical relationships, but rather as 

 similarities in structure or conforniation which allow them to be 

 classified. The adlumia and bleeding-heart would seem to be closely 

 allied to the families which have gamopetalous corollas, but most of 

 the closely associated plants are polypetalous, and it is held, there- 

 fore, to be a departure among polypetalous plants. The mere fact 

 of polypetaly, gamopetaly or apetaly is held to be less siguificanl 

 in classification than formerly. 



XL. PARTICULAR TYPES OF FLOWERS, 

 CONTINUED 



248. Grape flowers are shown in Fig. 208. An 

 unopened flower is at 1. The balloon- shaped por- 

 tion is the corolla. The calyx is merely a rim 

 or disc at the base. The petals break apart from 



