VARIOUS FORMS OF COROLLA. 



constitutes tha upper part. Its form varies very much : some- 

 times it is rounded, sometimes acute, sometimes Iwllow, and at 

 other times its base is prolonged like a spur. Like the calyx, 

 the corolla is sometimes regular, sometimes irregular; sometimes 

 jt *.s cadu'cous; that is, it falls as soon as it is expanded or blown, 

 at other times it fades in the flower before it is detached, and is 

 then said to be marcescent, and we generally distinguish an in- 

 ferior, straight portion, which, in monopetalous flowers, consti- 

 tutes the tube; a superior part which is more or less flaring, 

 called limb, and a circular line which separates the latter from 

 the tube, and bears the name of throat. 



The general form of the corolla varies much ; the following 

 are its principal modifications. 



VARIETIES OF THE COROLLA. 



Corollas are monope'talous, when they are formed of a single 

 petal, and polype' talous, when they consist of several petals. 



MONOPETALOUS COROLLAS are either regular or irregular. 



31. The principal forms of REGULAR MONOPETALOUS COROLLAS, 

 are the following : 



Tubular, when the tube is long, as in the 

 lily. 



Campanidate, or bell-shaped, as in the 

 annexed figure (85). (From the Latin, cam- 

 pana, a bell.) Example: the campanula. 



Fig. 85. CAMPANULATE. 



Infundibular, or funnel-shaped, as in the flower 

 of the tobacco (fig. 86). 



(Infundibular, from the Latin, infundibulum, a 

 funnel.) 



Fig. 86. 



INFUNDIBUI.AR 



31. What is a tubular corolla? When is it campanulate ? When is it 

 nfundibular? When is it cyathiform ? What is a hypocrate'riform 

 corona ? What is a rotate corolla ? What is an urce'olate corolla ? What 

 9 a scu'tellate corolla ? 



16 



