120 SILVA OF NORTH AMERICA. SALICACEZ. 
inhabits the banks of a stream in the Sabino Canon on the southern slope of the Santa Catalina Moun- 
tains,’ and is not uncommon in the canons of the Chericahua and Huachuca Mountains. 
The wood of Salix Bonplandiana has not been examined scientifically. 
A representative of the tropical Willows, Salix Bonplandiana is the only species that has been 
found in the United States with leaves which do not fall in the autumn.? 
1 In February, 1894, Salix Bonplandiana was discovered in Sa- Akad. Handl. ser. 4, vi. t. 1, f. 14 [Monographia Salicum]), is well 
bino Cafion about fifteen miles from Tucson, Arizona, by W. M. developed in the specimens from Sabino Cafion which we have 
Canby, J. W. Toumey, and C. S. Sargent. been able to examine; and among the Willows of the United States 
2 The cup-shaped glandular disk of the pistillate flower, which is Salix Bonplandiana is the only species with a cup-like disk. 
not represented in Andersson’s figure of this species (Svensk. Vetensk. 
EXPLANATION OF THE PLATE. 
Puiate CCCCLXXII. Sarrx BonpianpiaAna. 
1. A flowering branch of the staminate tree, natural size. 
2. A staminate flower, enlarged. 
3. Scale of a staminate flower, rear view, enlarged. 
4. A flowering branch of the pistillate tree, natural size. 
5. A pistillate flower with its scale, front view, enlarged. 
6. A pistillate flower with its scale, side view, enlarged. 
7. A pistil, enlarged. 
8. A fruiting branch, natural size. 
9. A capsule, enlarged. 
10. A summer branch, natural size. 
