The History of Plant Tissue Culture 39 



Fig. 12. Philip R. White, 1901- . Associate, The Rocke- 

 feller Institute for Medical Research, Princeton, N. J. First to 

 cultivate root tips and, independently from Gautheret, undiffer- 

 entiated plant tissues in vitro for unlimited periods. Student of 

 the nutrition and morphogenesis of excised plant tissues. 



