[305]

Trifolium resupinatum

Nov. 3 77. Nutation of stem traced on vertical glass

Kept in almost darkness

Fig 103

(1/2 scale no lettering)

[306]

Trifolium resupinatum

Tracing I

(1/4 scale 4 sets of lettering)

Fig 122

(See Back for description)

[306v]

 

45

Introduction

This conclusion, as we shall hereafter see, is closely connected with and throws some little light on various important physiological problems, ─ such as the benefits derived from slight changes in the conditions of life, and this again stands in the closest connection with life itself. It throws light on the origin of the two sexes, and on their separation or union in the same individual, and lastly on the whole subject of hybridism which is one of the greatest obstacles to the general acceptance in the progress of the great principle of evolution.

(In order to avoid misapprehension, I beg leave to repeat that throughout this volume, a crossed plant, seedling or seed means one of crossed parentage, that is one derived from a flower fertilised with pollen from a distinct plant of the same species. And that a self-fertilised plant, seedling or seed, means one of self-fertilised parentage, that is one derived from a flower fertilised with pollen from the same flower, or sometimes when thus stated from another flower on the same plant.)