PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



59 



couutry is very billy, and therefore adapted to it. The nearest point in 

 Indiana where I can iind a record of its occurrence is Orange County, 

 the third county east from Knox. 

 2. (8.) Liriodendron tulipifera. Tulip Tree ; " Poplar." 



Formerly very abundant, and still common in some localities. The 

 great demand for poplar lumber for weatherboarding, etc., has greatly 

 depleted the supply, however. Although growing both on the hills and 

 in the river bottoms, the growth of the former will probably average 

 larger than the latter. The larger trees of this species now standing 

 will average about 5 feet diameter and 140 feet high, though specimens 

 of much larger size may still be found, and formerly were numerous. 

 A few yet exist, having a diameter of 7 or even 8 feet, but they are ex- 

 ceedingly rare. Straight trunks of 50 to 70 feet clear are occasionally 

 found, and twenty years ago trunks 100 feet long were not so very uu- 

 frequent. 



Lumbermen recognize three varieties of the "poplar"— the "yellow," 

 "white," and "blue," distinguished, however, only by the color of the 

 wood. The first is the most abundant, and produces the best lumber. 



This species flowers during the first half of May, leafing the first 

 half of April. 



List of S2)€cimtns measured.* 



Tbie measurements are in feet. 



