LECTURE XII 



FIVE-LEAVED CLOVER 



Every one knows the " four-leaved " clover. 

 It is occasionally found on lawns, in pastures 

 and by the roadsides. Specimens with five leaf- 

 lets may be found now and then in the same 

 place, or on the same plant, but these are rarer. 

 I have often seen isolated plants with quater- 

 nate leaves, but only rarely have I observed in- 

 dividuals with more than one such leaf. 



The two cases are essentially dissimilar. 

 They may appear to differ but little morpholog- 

 ically, but from the point of view of heredity 

 they are quite different. Isolated quaternate 

 leaves are of but little interest, while the occur- 

 rence of many on the same individual indicates a 

 distinct variety. In making experiments upon 

 this point it is necessary to transplant the di- 

 vergent individuals to a garden in order to 

 furnish them proper cultural conditions and 

 to keep them under constant observation. When 

 a plant bearing a quaternate leaf is thus 

 transplanted however, it rarely repeats the 



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