380 BOTANICAL GAZETTE [November 



Fig. 29. — Median longitudinal section similar to fig. 28: ct, cotyledonary 

 traces; cp, caplike tissue; s, suspensor. X30. 



Fig. 30. — Cross-section of young seedling at region of union of cotyledonary 

 trace with vascular cylinder: ct, cotyledonary traces belonging to one cotyledon. 

 X16. 



Fig. 31. — Section of same further up to show girdling: LI, outer long girdle; 

 Li, outer shorter girdle; LI, L\, inner girdles; all of second leaf. X16. 



Figs. 32, ^i- — Cross-sections of embryo at region of vascular plate (vp); 

 px, protoxylem; x, xylem; ph, phloem; union of cotyledonary traces two by 

 two, and union of resultants with vascular plate at protoxylem groups. X30. 



Fig. 34. — Median longitudinal section of seedling three years old: pc, pro- 

 cambium; Ug, girdle; //, trace; Ig, leaf gap. X30. 



Fig. 35. — Cross-section of embryo to show early appearance of girdle; pc, 

 procambium; Ug 1 , girdle of very young leaf; Ug 2 , girdle of next older leaf. X30. 



The black spots in all the photographs are mucilage cavities or cells. 



