8 4 ELEMENTARY BIOLOGY, [CHAP. 



/?. Inside the calyx the corolla : the most con- 

 spicuous part of the flower. 



y. Inside the corolla the stamens. 

 8. Within the stamens the//V///. 

 2. The calyx. 



A cup terminated at its free edge by five prominent 

 points, two dorsal, and three ventral : the five small 

 midribs running along it (one to the end of each of 

 the points) represent the free ends of five sepals, 

 which are united below. 



3 . The corolla. 



a. Composed of five pieces or petals. 



a. On the dorsal side, a single large piece (vexil- 

 lum) expanded at its free end and folded over 

 the rest. 



/?. On the sides, two oval pieces (alee), each 

 attached by a distinct narrowed stalk (unguis). 



y. The inferior part of the corolla (carina), com- 

 posed of two oval pieces united along their 

 lower edge but readily tearing apart. 



The stamens. 



a. Ten in number, each consisting of a stalk- like 

 part, the filament, terminated by a small knob, 

 the anther. 



b. The union of the filaments for three-fourths of 

 their length to form the stamen-tube : the sharp 

 bend of the filaments towards the upper side at 

 the point where they separate from one another. 



c. Tease out an anther in water and examine with 

 \ obj. : there will be found numerous 



