ANDRCECIUM. 379 



Epacris imipreHsa^ and there are analogous phenomena 

 in the common honeysuckle (Lonicera Periclymenum), 

 in which three corollas and no stamens often occur. 



This duplication may either be accounted for on the 

 theory of chorisis above alluded to, or by supposing 

 that the extra coroUine whorl is due to a series of con- 

 fluent petalodic stamens; that the latter is the true 

 explanation, in certain cases at least, is shown by some 

 flowers of Datura fastuosa, in which the second corolla 

 was partially staminal in its appearance, and bore 

 nearly perfect anthers, in addition to the five ordinary 

 stamens, which were unaltered either in form or position. 

 Some partially virescent honeysuckle flowers have a 

 similar structure. 



There are other cases of apparent multiplication or 

 duplication, due, probably, rather to the formation of 

 outgrowths from the petals than to actual augmentation 

 of their number. These excrescences occur sometimes 

 on the inner surface of the petals, or of the corolla ; 

 at other times on the outer surface, as in some gloxinias, 

 &c. This matter will be more fully treated of under 

 the head of hypertrophy and enation. 



Pleiotaxy of the andrcecium. An increase in the number 

 of whorls in the stamens is very common, especially in 

 cases where the number of circles of stamens is natu- 

 rally large. The augmentation of the number of sta- 

 mens is still more frequent where these organs are 

 arranged, not in verticils, but in one continuous spiral 

 line. 



In Cruciferce there is always an indication of two 

 whorls of stamens, and this indication is rendered 

 even more apparent in some varieties accidentally met 

 with. So in Saponaria, in Dlanthus, and other Canjo- 

 phyllece, three and four verticils of stamens have been 

 met with. In Lonicera Periclymenum a second whorl 

 of stamens more or less petalodic sometimes occurs. 



Moquin mentions a variety of Rubus frutieoi^int in 

 ' ' Seemann's Journal of Botany,' iii, p. 354. 



