324 
BOTAXY. 
and west to Oregon. Wasilioe Mountains and Truckee Valley, Nevada : at 
City of Rocks in Southeastern Idaho, and in the Wahsatch and Uintas ; 
4-7,000 feet altitude. This is the prevalent western form, often collected, 
but variously referred. It is 422 Fremont, (1845,) 811 Fendler from New 
Mexico, 215 Greyer, 340 Parry, and 519 Hall & Harbour from Colorado, 
(the last called A. rubra by Kegel,) 530 Vasey, 104 Anderson, &c. It 
must include Kegel's J. serrulata^ Var. rugosa, for all the localities but per- 
haps California. (1,090.) 
SALICACEiE. 
Salix longifolia, Muhl. From the Northern States and Canada to 
the Arctic Circle and the Pacific ; in Arkansas, Texas, New Mexico, and 
California, The most common willow of Nevada and Utah, usually in dense 
clumps, 3-8° high ; stems erect and rarely exceeding 1' in diameter, with 
grayish bark ; very variable in pubescence, size of the leaves, &c. This 
number includes specimens having the fertile aments 1' long, densely 
crowded with glabrous capsules, terminal (or often apparently lateral) and 
mostly solitary upon the extremities of the branchlets ; leaves pubescent, 
becoming glabrate, 2-3' long and 2-3" wide. 4-6,000 feet altitude ; May- 
August. (1,091.) 
Another common form has the catkins in clusters of 4-8 at the extrem- 
ities of the branches, the fertile ones 1-2 J' long? densely crowded ; cap- 
sules ovate-conic, villous-pubescent and nearly sessile ; leaves 2-4' long, 2-7" 
wide, becoming glabrous. (1,092.) 
A rarer form, approaching S. Hindsiana^ Benth., was collected on sandy 
foot-hills near Carson City, Nevada, with the fertile aments soHtary and ter- 
minal upon the short leafy branchlets, about J' in length, very loosely fruited ; 
capsules long-conical, glabrous, the pedicel exceeding the gland; the still 
rather young leaves less than an inch long, 1" wide ; 3^ high, divaricately 
branching, with slender virgate branchlets and yellow bark. (1,093.) 
Var. ARGYROPHYLLA, Nutt. DC. Prodr. 16. 2. 214. Leaves and capsules 
covered witli a glistening silvery tomentum. — A common form, with the 
silky tomentum more or less abundant ; aments solitary and terminal, short, 
J-1' long, and rather densely flowered ; leaves very variable, lj-5' long and 
1-6" wide. (1,094) 
Salix cordata, Muhl., nearly Var. angustata, And. The species is 
