A SIMPLE-LEAVED MUTATION 



Figure 20. Compare the simple leaves of this plant with the palmately cleft leaves shown 

 in Figures 17 and 21. 



This mutation appeared in a strain of the Ferramington variety. The leaflets of the normal 

 digitate leaves appear to have grown together, as the normal number of midribs is present and the 

 usual number of lobes. (See text, p. 282. j 



proper greenhouse facilities are not 

 available, the investigation can be 

 conducted entirely in the field without 

 any greater loss of time than if plants 

 like corn and tobacco were used. 

 Sufficient cloth tents would be neces- 

 sary both in the field and in the 

 greenhouse. Genetic investigations 

 with hemp are somewhat out of the 

 question, then, unless sufficient funds 

 are available. 



"Variation is at once the hope and 

 despair of the breeder," but a large 



number of sharply segregating charac- 

 ters are the hope and not the despair 

 of the geneticist. Drosophila investi- 

 gators have found that flies trapped 

 in the open are largely of the normal 

 wild form and that new characters 

 are discovered through inbreeding and 

 hybridization. The discovery of the 

 present multiplicity of forms in Z.ea 

 maize has been the result of careful 

 observation and experimentation. In 

 an obligator}^ cross-fertilized genus 

 like Cannabis we would naturally 



