166 



MANUAL OP BOTANY 



plants, for instance, the Comfrey, Borage, Forget-me-not (fig. 

 308, r) ; and also in the Dodder, and many other plants 

 Sometimes these scales become more or less united and form 



Fig. 326 



Fig. 324. 



Fig. 325. 



Fig. 324. Petal of a Buttercup with a nectariferous scale at its base. Fig. 



325. One of the petals of Mignonette {Reseda). Fig. 326. A petal of the 



Grass of Parnassus (Paj'nassia palustris) bearing a li-inged scale at its base. 



a cup-shaped structure, as in the perianth of the Daffodil (fig. 

 328) and other species of Narcissus ; to this the term corona is 

 commonly applied. The beautiful fringes on the corolla of the 

 Passion-flower are of a similar nature. 



Fig. 328. 



/'(/. 327. A petal of a species of Lycfutia o. Claw. I. Limb. a. Scaly ap- 

 pendages. Fig. 328. Flower of the Daffodil (^^arcissiis Fseudo-nareissus), 



The cup- or bell-shaped process towards the centre is termed a corona. 



The origin of all these scales is by no means clearly ascer- 

 tained ; by some botanists they have been supposed to be de- 

 rived from the petals, by others to be abortive stamens ; those 



