376 NOTICES OF BOOKS. 
- not help thinking that gyno-dicecism can be better explained on the 
view of a sufficiency of pollen for the fertilisation of all the individuals 
of a species being produced by only a few of the flowers, so that instead 
of some of the anthers of all the flowers becoming abortive— 
bees were able to fully fertilise ten female flowers with pollen from a 
so bythe fact that all k oat Pim . . 
we not see this form of sexual separation in multiovulate ones, 
where a much greater effect would undoubtedly be obtained? The 
result of Mr. win’s experiments on fertilisation (such as they 
compensation, in somewhat diminished fertility. Wethink, though, 
that Mr. Darwin’s explanation of the reduction in size of the female 
corolla is correct, 
_ The closing chapter deals with cleistogamy, and contains Kuhn’s 
list,* with a few emendations and additions. This wonderful pheno- 
~ . 8 list contains the two Asclepiadeous _Stapelia and Hoya, Tt 
‘is indeed difficult to conceive cleistogamy in this order, and our sat pinicibs 
_ ere aroused on first perusing the list. Since then Mr. N. E. Brown, who 
is making a careful study of Stapelia, has informed us that he doubts whether 
n S over the ovary, the flower re- 
when the ovary begins to swell. 
