438 



ELONGATION OF 



the lobos or leaflets become separated one from another 

 by a kind of apostasis. Tliis change maybe frequently 

 seen in the horse-chestnut, particularly in the young 



Via. 207. Portion of leaf of parsley, showing the change from short 

 wavy to long flat leaf-lobes. 



shoots formed after the trees have been pruned or 

 pollarded. In the adjoining cut the intermediate stages 

 between a palmate or digitate leaf to a pinnate one 

 may be seen. The specimens from which the drawing 

 was made were taken from the same tree at the same 

 time. 



In the white clover, TrifoUum repens, a similar tran- 

 sition may often be observed, as also in some species 

 of Potentilla} 



Elongation of the parts of the flower. The only circum- 

 stance that needs especial mention under this section 

 is the great lengthening that sometimes takes place in 



> Schlechtendal, ' Bot. Zeit.,' 1844, p. 457 ; ' Linnsea,' xi, p. 301, xiv, 



J. 363 ; 'Bot. Zeit.,' 1866, p. 72 ; Masters, ' Rep. Brit. Assoc.,' Manchester. 

 861 ; Coultas, ' What may be learnt from a tree,' p. 118. 



