[112]

Porliera hygrometrica

July 7. & 8

Circumnutation & sleep of leaf

F 158 (1/3 scale no lettering)

[112v]

(32 746

Ch XI

my son*, (Nature Jan 8. 1874 p 189) with their nectaries sucked dry. They thus waste much time, and are induced excited to bite the holes, so as to find out as quickly as possible whether there is any nectar present & if so to obtain it.

(Flowers which are partially or wholly sterile unless visited by insects in the proper manner such as those of most of the species of Salvia, of Trifolium pratense, and Phaseolus multiflorus &c which depend for their fertilisation either in part of being altogether or largely on being visited by insects in the proper manner will fail more or less completely to produce seeds either completely or partially which if the bees confine their visits to the perforation. The flowers of those plants which are capable of fertilising themselves, will if they are all perforated with Even if when an abundance of seeds is be produced by any plant having all that treated there will be its flowers perforated such seeds yield only self-fertilised seeds, and the seedlings will in consequence be less vigorous. Therefore all pants will not will suffer when bees steal take obtain their nectar in a felonious manner by biting holes through the corolla; and many of them species, it might be thought, would become utterly extinct. But here, as is so general throughout nature, there is a tendency towards a restored equilibrium. If a plant suffered from being perforated fewer individuals will be reared, and if the nectar is highly important to the bees these likewise in their turn will suffer & decrease in number; but what is much