66 FLORAL LEAVES 



it opens along two lines. In the Wallflower the gynsecium 

 consists of a two-chambered ovary with two parietal placentas, 

 and one style with two stigmas ; in the fruit-condition the ovary 

 opens along two lines; therefore the gynaecium consists of 

 two carpels which are joined together (syncarpous). 



'THE ABSENCE OF STAMENS OR CARPELS. 



The majority of familiar flowers possess both stamens and 

 carpels, and are said to be monodinous (e.g. Buttercup, Wall- 

 flower, Pea, Hyacinth). But the stamens and carpels of some 

 plants do not occur in the same flowers, which are then de- 

 scribed as being diclinous (e.g., Hazel, Scotch Pine). A plant 

 having diclinous flowers naturally will possess two kinds of 

 flowers : staminate flowers, which have stamens but are without 

 carpels ; and carpellary flowers, endowed with carpels but 

 devoid of stamens. 



