[81 & 82]

Oxalis bupleurifolia

circumnutation of phyllodium-like petiole

F. 157 (1/2 scale no lettering)

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[82v]

87 698

Chap. E 10

and V. faba (a) text As the leaves of some plants secrete only during certain states of the weather, there does not appear to be mu much force in Delpino's argument, bearing in mind that the leaves of some plants excrete sugar only having certain states of the weather, that the glands are not excretory, because if they were so, such glands would occur in almost all plants every species. That in some cases the secretion does serve to attract insects as dependers of the plant, and many many have been increased for this special purpose, I have not the least doubt from the observations of Delpino and more especially from those on the Acacia sphœrocephala and on passion-flowers by Mr. Belt. This acacia likewise produces as an additional attraction to ants small bodies containing much oil and protoplasm, and analogous bodies are developed by a Cecropia for the same purpose, as described by Fritz Müller.*(7)

The excretion of a sweet fluid by glands seated [text excised] has rarely been utilised as

[83 & 84]

Jun 26-27 1878

Leaflet

Fig 156 (1/2 scale no lettering)

[84]

Chap. E 10

another purpose the labella of a large numb

of the Fly Ophrys (which is rarely visited

and found on all very many pollen-grain

had been caught by their velvety surfaces

The extraordinary quantity and ligh

the pollen of anemophilous plants no doubt as it has generally to be carried by a mere chance gene to the

another and other distant often distant flower

shall soon see, most anemophilous plants

sexes separated. The fertilisation of these f

generally aided by the stigmas being of l

and after frequently plumose; and in the case of the

by the naked ovule

a drop of fluid as Delpino has shown. Although, as the author remarks, the number of anemophilous species

the number of individuals is large in comp

those of entomophilous plants species. This holds good

in the north where insects are not so n

as under a warmer climate, and where