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 
‘ial 
Fig. 4.— A flower of Tobacco. c, the Fic. 5. — Flower of Red Clover. 
funnel-shaped corolla made up of united, corolla; b, cup-like calyx. Much 
petals; b, calyx. The sepals are also enlarged. After Hayden. 
united below. Reduced. 
floral parts are attached is called torus or receptacle. The 
receptacle may be flat, conical, or cup-shaped, and often forms 
Fic. 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, 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. 
