iPrAs bis 
PLEIOMORPHY! 
Most irregular flowers owe their irregularity to an 
unequal development of some of their organs as 
compared with that of others. When such flowers 
become exceptionally regular they do so either because 
development does not keep pace with growth, and a 
regular flower is thus the result of an arrest of the former 
process (regular peloria), or because the comparatively 
excessive development, which usually occurs in a few 
parts is, In exceptional cases manifested by all, hence the 
flower becomes regular from the increase in number of 
its irregular elements. ‘These latter cases, then, are 
due to an excess of development, hence the application 
of the term pleiomorphy. It must be understood that 
mere increase in the number of the organs of a flower 
is not included under this head, but under that of 
deviations from the ordinary number of parts. 

CHAPTER IL. 
IRREGULAR PHLORIA. 
Tur term peloria was originally given by Linné 
to a malformation of Linaria vulgaris, with five spurs 
and five stamens, which was first found in 1742 near 
Upsal. This was considered so marvellous a circum- 
stance that the term peloria, from the Greek védwp, a 
1 TI\etog-poppwore. 
