Fig. 34. OPEN GROWN PINES. 

 White on left. Yellow on right. Both trunks exeurrent and developed in same envir- 

 onment. Difference of form is due to inherent qualities. One tapers, with per- 

 sistent lateral branches; the other with little taper and few branches. 



Fig 35. OPEN GROWN AMERICAN ELM. 

 Its trunk branches near the base and then repeatedly subdivides. Such a trunk is 

 known as a deliquescent trunk. 



