

FLOWERS, THEIR STRUCTURE AND KINDS 165 



shape of a curved, thin, flattened body which is known as the 

 "keel." 



263. The stamens are ten in number, and are in two groups. 

 One group consists of a single stamen, the upper one. The 

 other nine are joined into one group, the filaments being united 

 at their base for half their length and closely wrapped about the 

 small flattened pod, the single stamen lying at the point where 



Fig. 122. 



Flowers of sweet pea, corolla removed. Note diadelphous stamens, one single one, the 

 others all united. 



the edges of the united filaments approach. When the stamens 

 form two groups they are said to be diadelphous (i.e., of two 

 brotherhoods). The anthers are adnate, two-lobed, each lobe 

 having one locule, which opens by a longitudinal cleft on its 

 inner face. 



264. The pistil is simple. The ovary is flattened, elongate, 

 with the ovules arranged in a row at the upper edge. It forms 

 the pod, or legume. The style is slender and curved upward, 



