[33]

Red Cabbage apogeotropism of Hypocotyl

Sept 12th 1878 to morning of 13th

1/3 Scale no lettering

(Fig. 218)

[33v]

Introduction

under two forms;­ that is produce on distinct stocks two kinds of hermaphrodite flowers. both

The one form bears small flowers but still open flowers constructed for self-fertilisation, whilst the other forms bears larger and much more conspicuous flowers plainly constructed for cross-fertilisation by the aid of insects; and continue quite sterile without their aid produce no seed.

(open)

The adaptation of flowers for cross-fertilisation is a subject which has interested me for the last thirty-seven years, and I have collected a large mass of observations, but these are now rendered superfluous by the many excellent works which have been lately published. In the year 1857 I published wrote* (*Gardeners' Chronicle 1857. p. 725 and 1858 p. 824 and 844. Annals & Mag. of Nat. Hist. 3rd Series. Vol. 2. 1858. p. 462) a short paper on the fertilisation of the Kidney Bean: and in 1862 my work 'On the contrivances by which British and Foreign Orchids are Fertilised by