86 



PKOCEEDIXGS OF UNITED STATES NATIONAL MUSEUM. 



even 4 feet in diameter, 

 in length. 



The only one actually measured was 84 feet 



83. (260.) Salix lucida. Shining Willow. 

 "Moist banks of streams; common.^ 

 ments. 



(ScHNECK.) JiTo measure- 



84. ( 



— .) Salix discolor. Glaucous Willow. . 

 Moist banks and along stream ; rare." (Schneck.) 



No measure- 



ments. 



85. (261.) Salix nigra. Black Willow. 



Much the most abundant and also by far the largest of our native 

 willows. In some swamps the trees of this species average 60 to 70 

 feet high and more than a foot in diameter, while trees considerably 

 larger are occasionally met with. Two trees growing on the border 

 of Monteur's Pond, in Knox County, Indiana, measured, respectively, 

 80 and 87^ feet in length, the latter being more than 3 feet in diameter 

 (10 in girth), the former 7^ feet in circumference, and 18J feet to the 

 hrst limb. One cut expressly for measurement, near the mouth of 

 Crawfish Creek (Wabash County, Illinois), was 77 feet long, 55 feet to 

 the first limb, and only 2^ feet around ! Two other trees, measuring re- 

 spectively 8^ and 9 feet in girth, were also measured, the former being 

 30 feet to the first limb. 



86. (260.) Populuslieterophylla. "Eiver Cottonwood "5 " Swamp Cotton- 

 wood"; "Stui3yGum" (Knox County, vern.). 



Very common about the borders of swamps, usually associated with 

 the Black Willow {Salix nigra). Much inferior in size to P. monilifera, 

 the largest trees scarcely exceeding 90 feet in height and 2 to 2^ in 

 diameter. The trunk, however, is usually very long in proportion, fre- 

 quently occupying two-thirds or more of the total length. Only three 

 trees of this species have been actually measured, the following being 

 their dimensions: 



Locality. 



Authority. 



Knox County, Indiana. 



do 



do 



R. R. 

 R. R. 

 R. R. 



87. (267.) Populus monilifera. Cottonwood; "Big Cottonwood." 



A very common tree in rich bottom lands and along the alluvial banks 

 of streams, where it occasioiially attains an immense size and altitude. 

 Trees of 5 to 6 feet diameter are not uncommon, while trunks of 7 or even 

 8 feet are occasionally to be met with; the stem being usually more 

 than 50 feet clear. The total height of the tallest cottonwoods is gen- 



