Fig. 57. Illustrating the diversity of form and structure of embryos 

 A-H, Ulmus americana (after Shattuck). J-L, Eriocaulon septaiigiilare. J, Two- 

 celled stage. K, Quadrant stage. L, Embryo from mature seed ( x 730, redrawn 

 from Smith). M-R, Sedum acre (redrawn from Soueges). S, Chenopodiiim bomis- 

 henricus{x 460, diagrammatic after Soueges). T-X,Tnfoliiim minus {T-Y, x 500; 

 W, X 350; X, X 180; redrawn from Soueges). 



