HYBRIDS OF JUGLANS. 



51 



FIG. 17. Short secreting trichomes of Juglans californica X Juglants reffia,F 2 , plant C: a toe, origin 

 and growth of trichome previous to separation from epidermis (X 840)'; d and e, separation of 

 trichome rudiment from epidermis (X 1200j;/, 1-celled stage (X 840); y, first divison of trichome 

 (X 1200); /*., 2-celled trichome ( X 840); i, second division of trichome; j, 3-celled trichome ( X 1200); 

 k, third cell-division (x 1200); I, transverse section of leaf, showing long and short secreting tri. 

 chomes in place, 



