+K. Cot. 

 b. 



EXPLANATION. (See p. 213.) 



Water-cultures of Flower ) Hoan after vegetating 38 days. 



a. In normal solution, seed with eotyledons. 



b. In normal solution, seed without eotyledons. 



c. In potassium-free solution, seed with cotyledons. 



d. In potassium-free solution, seed without cotyledons. 



