392 Bums and H e d d e n, Conditions of infLuencing regeneration of hypocotyl. 
location of buds, wbile tbe principal factor is determining the 
location in relation to movement of food materials in plants. 
Conclusions. 
1. The young hypocotyls are capable of developing more 
buds and in a shorter time than old ones. 
2. Moisture is principal factor in formation of buds on unin- 
jured seedlings of plants studied. 
3. In injured seedlings, the time and number of buds is de- 
pendent upon light, moisture and heat. 
4. The position of buds is due indirectly to light, directly 
to the movement of materials in plants. 
5. The base of old plants is predisposed to but production, 
6. Glood vegetative conditions are best for production of 
buds on hypocotyl. 
University of Michigan, February 1905. 
