WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 161 
16. Salix nigra Marsh. Arb. Amer 139. 1785. Brack WILLOW. 
TYPE Locauity: North America. 
RANGE: California to Colorado and New Mexico, and eastward. 
New Mexico: Gila; Dog Spring; Emory Spring; Grant County; White Sands. 
Lower and Upper Sonoran zones. 
It is very probable that further study of what is here considered S. nigra in New 
Mexico will show that it belongs to S. wrightii, which is the common plant of the type. 
The leaves of our specimens are firmer than those of the eastern form and usually 
broader. 
17. Salix bonplandiana H. B. K. Nov. Gen. & Sp. 2: 24. pl. 101, 102. 1817. 
TYPE LocaALity: ‘‘In Regno Mexicano, locis opacatis prope Moran, Cabrera, Omitlan 
et Pachuca, alt. 1270-1350 hexap.”’ 
Rance: Arizona and New Mexico to Mexico. 
New Mexico: San Luis Mountains (Mearns 2189, 2434). 
18. Salix argophylla Nutt. N. Amer. Sylv. 1: 71. 1842. 
Type Locauity: ‘‘On the Boise River, toward its junction with the Shoshonee,”’ 
Idaho. 
Rance: Washington and Oregon to Idaho and New Mexico. 
New Mexico: Chama; Shiprock; Reserve. Along streams, in the Upper Sonoran 
and Transition zones. 
With us a shrub 2 to 3 meters high, 
19. Salix amygdaloides Anderss. Proc. Amer. Acad. 4: 53. 1858. 
Type LocaLity: Fort Pierre, South Dakota. 
RanGE: British Columbia and Quebec, southward to New York, Texas, and 
Oregon. 
New Mexico: Shiprock; Farmington. Along streams, in the Upper Sonoran Zone. 
This becomes a tree 10 meters high. 
20. Salix subcaerulea Piper, Bull. Torrey Club 27: 400. 1900. 
Saliz covillei Eastwood, Zoe 5: 80. 1900. 
Salix pachnophora Rydb. Bull. Torrey Club 31: 402. 1904. 
Type Locatity: Powder River Mountains, in wet meadows near the head of Eagle 
Creek, Oregon. 
RanGeE: Oregon and Montana to California and New Mexico. 
New Mexico: Along Willow Creek, Rio Arriba County (Standley 6702). Along 
streams and in wet meadows, in the Transition and Canadian zones. 
A tree 5 meters high or less. 
Order 18. JUGLANDALES. 
31. JUGLANDACEAE. Walnut Family. 
A small family of large or small trees and large shrubs, of considerable economic 
importance on account of the value of their wood for various purposes and because 
of their edible seeds generally called ‘‘nuts”; leaves pinnately compound, the leaflets 
mostly large; flowers moncecious, the sterile flowers in catkins, the fertile solitary 
or few together in short spikes. 
The family contains the well known black walnut and the English walnut of com- 
merce, the hickory nut, and the pecan. Only a single genus occurs native in our 
range, but the pecan is cultivated in a few localities. 
52576°—15. 11 
