THE FLOWER 



215 



Observe how the end of the style is bent over so as to bring 

 the stigma uppermost when the petals are depressed. Imag- 

 ine the legs of a bee or a butterfly resting there as he probed 

 for honey; with what organ would his body first come in 

 contact when he alighted ? If his thorax and abdomen had 

 previously become dusted with pollen when visiting another 

 flower, where would the pollen be deposited ? Do you notice 

 anything in the color, shape, or odor of this flower that would 

 be likely to attract insects ? Have you ever observed insects 



322 



321 



FIGS. 318-322. Dissection of a papilionaceous flower: 318, front view of a 

 corolla; 319, the petals displayed: v, vexillum, or standard; w, wings; k, keel ; 

 320, side view with all except one of the lower petals removed, showing the essential 

 organs protected in the keel: I, loose stamen; st, stamen tube; 321, side view, 

 showing how the anthers protrude when the keel is depressed ; 322, ground plan. 

 (After GRAY.) 



hovering around flowers of this kind ; for example, in clover 

 and pea fields, and about locust trees and wistaria vines? 

 What kind of insects, chiefly, have you seen about them ? 



Remove the sepals and petals from one side, and sketch 

 the flower in longitudinal section, showing the position of the 

 pistil and stamens. Then remove all the petals, and spread 

 in their natural order on the table before you, and sketch as 

 they lie (Fig. 319). Label the large, round upper one, 

 standard or vexillum; the smaller pair on each side, wings, 

 and the two more or less coherent ones in which the pistil 

 and stamens are contained, keel. 



239. The stamens. Count the stamens, and notice 

 how they are united into two sets of nine and one. Stamens 



