FLOWERS, THEIR STRUCTURE AND KINDS 151 



smaller end (said to have two claws). These two petals, because 

 of their position, are inown as the " wings " or alee. The two 

 front petals are par- 

 tially united into one 

 in the shape of a 

 curved, thin, flat- 

 tened body which is 

 known as the 

 "keel." 



249. The sta- 

 mens are ten in num- 

 ber, and are in two 

 groups. One group 

 consists of a single 

 stamen, the upper 

 one. The other nine Fi g-. T1 ;- 



Flowers of sweet pea in front and side view. 



are joined into one 



group, the filaments being united at their base for half their length 



and closely wrap- 

 ped about the 

 small flattened 

 pod, the single sta- 

 men lying at the 

 point where the 

 edge of the united 

 filaments ap- 

 proach. When the 

 stamens form two 

 groups they are 

 said to be diadel- 

 phous (i.e., of two 

 Fig . 1I2 . brotherhoods). 



Details of petals of sweet pea flower; banner above, wings at The anthers are 

 the side, keel below. - ^ 



adnate, two-lobed, 



each lobe having one locule,, which opens by # longitudinal cleft 

 on its inner face. 



