Bul. 186, Bureau of Plant Industry, U. S. Dept. of Agriculture, PLATE IV. 
Fic. 1.—EARLY STAGE Fig. 2.—LATER STAGE FiG. 3.—EARLY STAGE OF THE 
OF THE AERIAL FORM OF THE AERIAL FORM AERIAL FORM OF HAIRY-ROOT 
OF HAIRY-ROOT ON OF HAIRY-ROOT ON ON AN OLDER LIMB OF THE 
AN APPLE TWIG. THE SAME TWIG AS SAME TREE AS THAT FROM 
THAT SHOWN IN FIG- WHICH THE TWIGS SHOWN IN 
URE 1. FIGURES 1 AND 2 WERE TAKEN. 
