ORGANS OF REPRODUCTION. 



Fig. 486. Fig. 487. 



239 



Fig. 486. A petal of a species of Lychnis, o. Claw. I. Limb. a. Scaly 



appendage Fig. 487. Flower of Daffodil {Narcissus Pseiulo-Tiarcissus), 



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



their origin probably varies in different flowers. We shall 

 return to this subject hereafter under the head of General 

 Morphology and Symmetry of the Flower. By the old botanists 

 many of these appendages were described under the head of 

 nectaries, although but few of them possess the power of 

 secreting the honey-like matter or nectar from which they de- 

 rived their names ; they were therefore improperly so termed. 

 The nature of the so-called nectaries has been already described 

 under the head of Glands. 



The duration of the corolla varies like that of the calyx, but 

 it is almost always more fugitive than that organ. It is ca- 

 ducous if it falls as the flower opens, as in the Grape-vine ; 

 commonly it is deciduous, or falls oif soon after the opening of 

 the flower. In rare instances it is persistent, in which case it 

 usually becomes dry and shrivelled, as in Heaths and Cam- 

 panulas, when it is said to be marcescent. 



3. DEVELOPMENT OF THE FLORAL ENVELOPES. 



The manner in which the floral envelopes are developed may 

 be shortly summed up as follows : — 



1. They are subject to the same laws of development as the 

 leaves of a bud, and hence make their first appearance as little 



