222 



BOTANY. 



In the morning-glory (fig. 195) the petals are coherent^ form- 

 ing a funnel-shaped corolla as shown in the figure. Such a 

 corolla is also said to be gamopetalous. 

 Where the sepals are coherent the 

 . calyx is gamosepalous. The morning- 

 glory has a gamosepalous calyx also, 

 though the sepals are 

 only united near the 

 base. In the morn- 

 ing-glory the petal 

 parts can be distin- 

 guished, five in num- 

 ber, but they are not so prominent 

 as in the bluet (fig. 196), where there 

 are four prominent petal lobes. 



Sometimes the gamopetalous corol- 

 la is unequally lobed, when it may 

 be "bilabiate," i.e., two- 

 lipped as in the dead nettle 

 (fig. 197), where there are 

 three petal lobes in the lower 

 lip and two petal lobes in the 

 upper lip. Such a flower is 

 also said to be irregular. 

 The gamosepalous calyx may 

 also be two-lipped. 



365. Adherent. — In many plants one floral set is united with 

 another, when such sets are adherent. 



This is well shown in the flowers of the evening primrose, 

 where the tubes of the gamopetalous corolla and gamosepalous 

 calyx are united to form a long tube. This tube is again at its 

 base adherent to the outer surface of the ovary, and above, the 

 stamens are adherent to the throat of the tube (fig. 198). 



366. Epigynous, perigynous, and hypogynous. — Where any 

 portion of the calyx or corolla is adherent to the ovary, the 



Fig. 195. 

 Morning-glory (Convol- 

 vulus sepium). 



