DEDUCTION. GENERAL INSTANCES. 1 6? 



character in common are proved by many other 

 characters to be descended from a common 

 stock. In the case of climbing plants the same 

 kind of variation must have occurred indepen- 

 dently in all parts of the plant kingdom, or 

 there must have been a common source or ten- 

 dency which served as a starting point for the 

 development of the power to climb. 



In his work on climbing plants, first pub- 

 lished as a paper in the Linnean Journal, 1 he 

 worked out in a masterly way the gradations in 

 the power to climb, and between the different 

 methods of climbing, showing that all are mod- 

 ifications of the method of climbing by twining 

 of the stem/ Near the end of his work he said, 

 "We have seen how diversified are the move- 

 ments of climbing plants. . . . They belong to 

 many and widely different orders. . . . When 

 we reflect on this wide serial distribution of 

 plants having this power, and when we know 

 that in some of the largest well defined orders, 

 such as the Compos itae, Rubiaceae, Scrophu- 

 lariaceae, Liliaceae, etc., two or three genera 

 alone out of a host of genera in each, have this 

 power, the conclusion is forced on our minds 

 that the capacity of acquiring the revolving 



1 Journal of the Linnean Society, 1865, Botany, Vol. IX., 

 " On the Movements and Habits of Climbing Plants." 



