FLOWEETXG PLANTS AND FEBNS OF INDIANA. 701 



SALICACE.E. Willow Family. 



POPULUS L. 



P. alba L. White or Silver-leaf Poplar. 



This tree has escaped so widely from cultivation as to be consid- 

 ered a member of the State flora. It is found in yards and along 

 roadsides, having sprung up from suckers of older trees. The 

 species thrives well and grows rapidly as an escape. The wood is 

 soft and light and of little use in manufactures. 



Flowers in March and May. 



Range is practically identical with the places in which it has been 

 cultivated. 



P. heterophylla L. Swamp or Downy Poplar. 



Found in the swamps and alluvial soils of the southwestern 

 counties. A tree from eighty to ninety feet in height and of a 

 trunk diameter of from two to two and one half feet. Its wood is 

 light, soft and not strong. The species, according to Dr. Ridgway, 

 is much more abundant than any other species of the genus in Knox 

 and Gibson counties. 



Flowers in April and May. 



Vigo (Blatchley) ; Gibson and Posey (Schneck) ; Knox (Ridg- 

 way) ; Hamilton (Doane\ 



P. grandidentata Michx. Great-toothed Aspen or Poplar. 



This species is not of large distribution in the State. It is found 

 in rich woods and along the borders of streams and swamps. 



The wood is light, soft and not strong, and is of little value save 

 for paper pulp. 



Flowers in April and May. 



In addition to the citations the species is found sparingly along 

 the lower stretches of the Wabash and its tributaries. 



Gibson (Schneck) ; Knox (Ridgway). 



P. tremuloides Michx. American Aspen. 



Fairly distributed throughout the State ; common in the northern 

 and central counties, somewhat rare in the southwest Dr. Ridgway 

 says : "I have never seen P. tremuloides in Knox orGibson county, 

 though it may occur." Dr. Schneck, however, reports it as rare in 

 Gibson and Posey counties. 



The wood is light and soft, neither strong nor durable. Largely 

 manufactured into wood pulp, and in some localities used iu turnery 

 and for flooring. The species rarely exceed sixty feet in height, 

 with a maximum trunk diameter of two feet. 



