40 AN INTRODUCTION 



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extraordinary instance of plenitude is that of the 

 Opulus flore globoso, commonly called the^Gelder 

 Rose. In the common simple Opulus, the flowers 

 are produced on a cyma, which consists of a, great 

 number of campanulate, bell-shaped, hermaphrodite 

 flowers in the disk, and of others in the circumfer- 

 ence, whose corollae are larger, Hat, . and wheel- 

 shaped, and that are barren, wanting the pistil! urn, 

 But in the Opulus flore globoso, all the flowers of the 

 disk are barren also, and shaped like those of the 

 circumference ; so that the impletion here arises only 

 from the additional number of barren flowers, -the 

 corollae of which are of a larger' size ; and in this it 

 resembles the impletion of the compound flowers, of 

 which we shall presently speak. 



Before we leave the simple flowers, it will be of 

 use to remark, that a simple flower, in a state of 

 luxuriancy, may in all cases be distinguished from a 

 compound one in its natural state, by this rule, that 

 in simple flowers, how much soever multiplied, there 

 is but one pistil lu-m in the centre of the flower, com- 

 mon to the whole multiplication ; whereas in com- 

 pound flowers, each of the Florets is furnished with 

 its own pistillum and stamina. 



We come now to the impletion of COMPOUND 

 flowers ; that these are of three kinds, Ligulate, Tubu- 

 Jose, and Radiate, has been shewn and explained in 

 Ghap. xix. where it has also been seen, that there is 

 not either in the ligulate or tubulose any distinction 

 of disk or radius, all the florets in these being-alike ; 



tion of Daniel Rudberg on the Peloria in the Amoenitaies 

 Academicae, Vol. 1. p. 280. But as the Linaria and Peloria 

 differ so widely 'in their Corollae and Stamina^ that the for- 

 mer must be referred to the class Didynamia, and the latter 

 to the class Pentandria, the Peloria cannot be supposed to de- 

 rive its origin from the Linaria, without overturning the fun- 

 damental principles of the science : And therefore, till mort 

 instances can be produced of this kind of irregularity in na- 

 ture, the Peloria cannot with safety be considered otherwise, 

 than as a Genus distinct from that of Antirrhinum. 



