68 INDEPENDENCE OR SEPARATION OF 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 

Fic. 29.—Flower of Oncidiwm 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- 
tuola incana and Silene conica completely divided, 
each section bearing half an anther, exactly as happens 
in Polygalacee. In tulips and hhes the same author 
mentions division of the anther only, the filament 
remaining entire, as happens naturally m many species 
of Vacciniwin. 
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. 
