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Fig. 14.1— A comparative study of Vinco rosea L. diploid and tetraploid strains. A. 

 Shoot apex of tetraploid plants showing layers of cells, outermost is the first tunica or 

 T , second layer L, third layer C, and deeper strata become C, etc. B. Shoot apex of 

 diploid plant and foliar primordia. C. Brush method for treating ycung plants with 

 colchicine. D. Size differences between the tetraploid and diploid flowers. Larger Hower 

 is tetraploid. E. Tetraploid pollen mother cell, n— 16. F. Diploid pollen mother cell, n—S. 

 (Contributions from the Botany Department, University of Oklahoma, Norman, Ok.a- 

 homa. Adapted from Schnell) 



