COROLLA. 



Fig. 49. 



Polypetdlous corollas consist of several 

 petals. Each petal consists of two parts, 

 the lamina and claw. 



The lamina (Fig. 49, a), is the upper 

 and usually the thinner part of the petal ; 

 its margin is sometimes entire, 6r without 

 divisions, as in the rose ; sometimes notch- 

 ed, or crenate, as in the pink. The lami- 

 na corresponds to the limb of monopeta- 

 lous corollas. 



The daw (Fig. 49, b), is the lower part 

 of the petal, and inserted upon the recep- 

 tacle ; it is sometimes very short, as in 

 the rose ; in the pink, as seen at Fig. 49, it is long and slender. 

 The claw is analogous to the tube of monopetalous corollas. 



The corolla is superior when it is inserted above the germ ; 

 inferior, when below. It is regular when each division cor- 

 responds to the other. The rose and pink have regular corol- 

 las. When the parts do not correspond with each other, a co- 

 rolla is irregular, as in the geranium, pea, and labiate flowers. 



Different forms of Monopetalous Corollas. 



Monopetalous corollas may, according to their forms, be di- 

 vided as follows. 



Fig. 50. 



1st. Bell-form (campanulate, from 

 campanula, a little bell); the tube is 

 not very distinct, as the corolla gradu- 

 ally spreads from the base ; as in the 

 blue bell, hair bell, &c. At Fig. 50 

 is the representation of a bell-form co- 

 rolla ; it is monopetalous ; the limb (a) 

 is five parted; calyx (b) five parted; 

 corolla superior. 



2d. Funnel form (infundibuliformis, from infundi- 

 bullum, a funnel), having a tubular base, and a bor- 

 der opening in the form of a funnel, as the morning 

 glory (Fig. 51). 



Polypetalous Corolla, superior Inferior Regular Irregular Bell-form 

 Funnel-form. 



