68 INDEPENDENCE OR SEPARATION OP ORGANS. 



Wills offer a curious illustration of this condition. 

 It will be remembered that some of the lobes or petals 

 of a verbena are normally divided at the base to a slight 



Fig. 29. Flower of Oncidium sp. seen from the back. The lip is 

 divided into three unequal segments. 



degree, but in the flowers in question this is carried 

 to such an extent that the enlarged lobes are pushed 

 into the centre of the flower and simulate, at a first 

 glance, a distinct and separate organ, though in reality 

 it is but an enlargement of what occurs normally.^ 



Moquin mentions having seen the stamens of Mat- 

 thiola incana and Silene conica completely divided, 

 each section bearing half an anther, exactly as happens 

 in Polygalacece. In tulips and lilies the same author 

 mentions division of the anther only, the filament 

 remaining entire, as happens naturally in many species 

 of Vaccinium. 



A division of the individual carpels occurs very fre- 

 quently when those organs become more or less leafy, 

 as in Trifolium repens, and other plants to be hereafter 

 mentioned. 



The instances given in this chapter have all been 

 cases wherein the division or the accessory growth 

 has taken place in one plane only and that plane 



1 Masters, ' Rep. Bot. Congress,' London, 1866. p. 136, tab. 7. f. 15, 16. 



