54 BOTANICAL GAZETTE [JULY 
fluviatilis Nutt. is the species which has been called S. sessilifolia by many 
authors and is so named in most herbaria. It is the species described as S. 
sessilifolia by ROWLEE in his revision of the LoncrFoL1AE. No specimen of 
NUTTALL’s collecting is known to exist. The species is quite different from 
the true S. sessilifolia. It is closely related to S. melanopsis Nutt., a species 
described from old Fort Hall, near Pocatello, Idaho. It resembles that species 
in the broad green leaves (fig. 3), often slightly glaucous beneath, and in the 
extremely long and glabrate or glabrous scales. It differs from S. melanopsis, 
owever, in the much longer, acute capsule, initially pubescent, and in the 
elongated style and stigmas. The style and stigmas, indeed, are very similar 
to those of true S. sessilifolia. It agrees with the brief description of S. 
fluviatilis in the spinulose-serrate, finally glabrous leaves. The capsules, how- 
ever, are not normally glabrous but sometimes become entirely glabrous in 
age. The stigmas, also, apparently are not sessile, as NuTTALL records for 
S. fluviatilis. The present species seems to be confined to the lower part of 
the Willamette Valley and adjacent Columbia River. The type locality for 
S. fluviatilis is “the immediate border of the Oregon (Columbia), a little below 
its confluence with the Wahlamet.” The writer plans to visit the type locality 
during the Ate season. 
SPECIM EXAMINED.—OREGON: Multnomah County: On river banks 
near aiiatg yee Howell (145?), July 1875 (FBb 6575, 6576); July 1876 
(F 206534); ‘‘Oregon, Howell” (FBb 4858); T. J. Howell, July 1877, dis- 
tributed by G. C. Woolson, no. 362 (G); the first three collections cited above 
are probably all one and the same thing but do not bear the same full label; 
Corbett, F. A. Walpole 1032, April 29, 1900 (N); Columbia River bottoms: 
Thomas J. Howell, July 1880, as “Salix sessilifolia’”? Nutt. (B, F 206860; 
FBb 4859; N); Sandbars, Columbia River, Thomas J. Howell, July 1880 (as 
S. sessilifolia var. villosa Nutt., F 206859; FBb 4860; N, 19244); Portland, 
between Portland and the mouth of the river, E. P. Sheldon 10862, July to, 
1902 (N, 2 sheets); Portland, Sheldon 12029, July 9, 1903 (F 216993). 
U.S. DEPARTMENT OF AGRICULTURE 
WasHINGTON, D.C. 
