xin ADAPTATION AND SEED-BUOYANCY 129 



conclusion arrived at in Chapter X. that there is no direct relation 

 between the density of sea-water and the buoyancy of seeds and 

 fruits, the floating capacities being as a rule far greater than the 

 adaptation view would explain. Nature, it is held, has never 

 made any provision for dispersal by currents, the buoyancy of 

 seeds and fruits being, as concerns the currents, a purely accidental 

 quality. 



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