INTRODUCTION. 



expanded part is termed the limb, the lower the claw ; 

 or united below, when the expanded part is termed the 

 border, the lower the tube. The corolla more frequently 



has as many petals or divisions as there are sepals ; and 

 if these are all of the same size and shape, the corolla 

 is said to be regular. 



The most common forms of the regular corolla of one 

 petal, are : 



Salver-sJiaped, as in Primrose, p. 512. 



Funnel-shaped, as in Cowslip, p. 514. 



Wheel-shaped, when the tube is no longer in pro- 

 portion than the axle of a wheel, as in Speedwell, 

 p. 471. 



Bell-shaped, as in Campanula, p. 384. 



Trumpet-shaped, as in Convolvulus, p. 425. 



When the irregular corolla of one petal is divided 

 into two lobes, one of which overhangs the other, it is 

 termed labiate, or lipped, as in the Natural Family 

 Labiatce, p. 474 ; if the lips are open, it is said to be 

 gaping, as in Yellow Dead Nettle, p. 490 ; if closed, 

 personate, (from persona, a mask,) as in Toadflax, 

 p. 459. In the Compound Flowers, p. 319, there are 

 frequently two kinds of florets in one flower ; those of 

 the disk, or centre, being tubular, without an evident 

 border ; those of the ray, or margin, strap-shaped, as 

 in the Daisy. 



