CHAPTER XIII

ADAPTATION AND SEED-BUOYANCY

The question of the operation of Natural Selection.—Are there two

principles at work?—The presence of buoyant tissue in the seed-tests

and fruit-coats of inland plants, both wild and cultivated.—Useless

buoyancy.—The buoyancy of seeds and fruits is not concerned with

Adaptation.—Summary.

_Pages_ 119-129

Observations of a Naturalist in the Pacific Between 1896 and 1899, Volume 2 Plant-Dispersal · 第 13 / 47 章