[Chap. XXVI FORMS AiND EXTERNAL FEATURES OF STEMS 253 



Fig. 87. Excurrent branching of the alpine fir, black hemlock, and lodgepole pine; 

 Bitter Root Mountains of Idaho. Photo from U. S. Forest Service. 



Fig. 88. Deliquescent branching of post oak in an open field. Diameter of crown, 

 60 feet. Photo by C. H. Jones. 



