1919] SCHNEIDER— AMERICAN WILLOWS 323 



[Willamette], and "we met this species likewise on the bank of the 

 Lewis River of the Shoshonee." The first locality has been visited 

 by Ball, and I follow him in his interpretation of this species. 

 Unfortunately no type specimen exists, and from Nuttall's 

 statement that "the germ is smooth, with 4 sessile stigmas" I 

 believe that he had partly S. melanopsis before him from the second 

 locality quoted, which is on the Snake River in western Idaho. 

 At present the true S. fluviatilis is only known from " the lower part 

 of the Willamette River and adjacent Columbia River" in Oregon, 

 Multnomah County, ranging eastward to Wasco County, The 

 Dalles, where Ball collected it on June 24, 1915 (nos. 1997, m., 

 1998, 1999, f., 2000, androgyn., 2005, fr., 2007, m., 2015, fr.; C, G.). 

 It has also been found on the opposite bank of the Columbia, in 

 Klickitat County, Wash., by Suksdorf, April 23, May 31, 1881 

 (no. 6, f., m.; C. [7876]). Other specimens of Ball's (nos. 1857, 

 1858, 1859; fr. adult.; G.) from northeastern Utah, Cache County, 

 Logan Canyon, above Logan, in my opinion are somewhat uncer- 

 tain. They suggest certain forms of S. melanopsis var. Bolan- 

 deriana, and indeed S. fluviatilis seems in some respects to be 

 quasi intermediate between S. sessilifolia and 5. melanopsis. Ball 

 himself says: "The species is quite different from the true sessili- 

 folia. It is closely related to S. melanopsis Nutt." But he also 

 states: "The style and stigmas indeed are very similar to those of 

 true 5. sessilifolia. " In fact, specimens collected by Ball on the 

 shores of the Umpqua River, near Roseburg, Oregon (no. 1961, 

 1962, f., fr.; G.), and distributed by him as " ?S. Bolanderiana 

 {X sessilifolia)," are somewhat similar to S . fluviatilis , which, how- 

 ever, seems to be a good species of a very local distribution, quite 

 different in the structure of the male flowers from that of the 

 melanopsis group. 



4. S. Parishiana Rowlee in Bull. Torr. Bot. Club 27:249. pi. g. 

 fig. 3. 1900; Abrams, Fl. Los Angeles suppl. ed. loi. 1911. — S. 

 sessilifolia Jepson, Fl. Cahf. 339. 1909, pro parte, non Nutt.; in 

 Mem. Univ. Cahf. 2 : 178 (Silva Calif.) 1910, pro parte.— 5. longifolia 

 var. argyrophylla Jeps. in Mem. I.e. pro parte. —5. argophylla Ahrsims, 

 I.e. 102, pro parte. — This is a peculiar and rather obscure species of 

 which Rowlee has given a somewhat unsatisfactory description. 



