12 



FLOWERS 



second whorl is the corolla and each separate portion is a petal. 

 The pistil occupies the central position and is surrounded by the 

 whorl of stamens. The end of the flower stem to which these 



~b 



FIG. 4. A flower of Tobacco, c, the 

 funnel-shaped corolla made up of united 

 petals; 6, calyx. The sepals are also 

 united below. Reduced. 



FIG. 5. Flower of Red Clover, 

 c, corolla; &, cup-like calyx. Much 

 enlarged. After Hayden. 



floral parts are attached is called torus or receptacle. The 

 receptacle may be flat, conical, or cup-shaped, and often forms 



FIG. 6. The two unisexual flowers of the Pumpkin with a portion of 

 the bell-shaped corollas torn away to show the interior of the flowers. 



A y staminate flower; s, stamens fitting together, forming a column. B, 

 pistillate flower. Less than half natural size. 



an important part of the fruit. The corolla is usually bright 

 colored, and, therefore, the conspicuous part of the flower. It is 

 also the fleeting part of the flower, usually lasting only a few days. 



