Adhesion of the Floral Organs. 



81 



. . Ovary. 



Calyx tube. 



Bifid 



Fig. 59. Ovary inferior and stemlike. 

 Calyx petaloid. 



ally decide the question. When the ovary is inferior the 



corolla and stamens must be adnate to the calyx or and 



this rarely happens, except in 

 orchids to the ovary or style. 

 Pick out all the flowers 

 which manifestly have inferior 

 ovaries, then find the ovaries in 

 the other flowers, so as to be 

 sure none of them are masquer- 

 lobes. adin g as Peduncles. Also m ake 

 vert i ca l sections to detect any 

 cases of ovaries partly inferior. 

 Make drawings showing vertical 



and cross-sections of the ovaries. The latter will usually 



show the number of carpels. The ovules grow in as many 



distinct sets as there are carpels. Sometimes the sets are 



in separate cavities called cells 



(Fig. 52) ; and sometimes they 



are on the sides of one central 



cell (Fig. 6 1 a); or, rarely, 



they grow in the center of a 



one-celled ovary (Fig. 6i). 



Remembering that carpels are 



leaves, which develop so as to 



form closed spaces or cells, it 



becomes easier to understand the structure of pistils. If 



there is but one carpel, as in the flowers of peas and 



peaches, the midrib appears as a ridge or channel along 



Fig. 60. Ovary partly inferior. 



