40 GRIGGS: OBSERVATIONS ON THE BEHAVIOR 
stone about twenty miles to the eastward. From this point it is 
abundant all over the sandstone part of the state and is one of 
the most important timber trees about Sugar Grove. What was 
Fic. 6. Rhododendron at Sugar Grove. (Photograph by J. E. Hyde.) 
my surprise then, on mapping its general range, to find its Michigan 
stations described in these terms by Beal:* “Occurs abundantly 
* Beal, W. J. Michigan Flora 69. Lansing, 1904. 
