NARROW-LEAF COTTONWOOD. 



I'opulus anr/ustifulia James. 



114- I'ruiting liranchlet, leaxes and fruit: branclilets m winter, the Inwer one bearing 

 mainly flower-buds. 



115- Trunk- of tree near Fort Collins. Colo. 



For this trunk jneture and speeiniens the author is indebted to Prof. B. 0. Longyear. 



