3i8 BOTANICAL GAZETTE [april 



plants are exactly alike. Nuttall himself gave an excellent 

 description, and it is rather astonishing that the species could have 

 ever been misunderstood. He described another species, however, 

 S. macrostachya, "from the banks of the Oregon" [Columbia], of 

 which there is a sterile(!) cotype in Herb. P. and a branchlet with 

 an old fruiting ament in Herb. G. According to some remnants the 

 style and the stigmas are exactly as in S. sessilifolia, and there is no 

 difference in the shape and pubescence of the leaves. Judging by 

 Nuttall's statement "amentis longissimis praecocibus," he had 

 before him a very early flowering state, and the fragment in G. 

 shows an old, almost sessile, long, fruiting ament which naturally 

 looks very different from the normal late flowering form with the 

 aments at the top of rather long leafy branchlets. The sheet in P. 

 also contains a female branch of which I do not know the origin, 

 because it is only partly represented in the photograph. It seems 

 to me that this branchlet belongs to the true 5. argophylla Nutt., 

 which has a similar foliage and pubescence but shorter stigmas, 

 looking more or less intermediate between 5'. sessilifolia and S. 

 exigua. I shall deal with it later. It has been mostly taken 

 hitherto for S. macrostachya. Ball (191 5) also referred specimens 

 from Cahfornia to 5. sessilifolia, but those forms I take for var. 

 Hindsiana. Sterile specimens collected by /. G. Jack in Oregon, 

 Josephine County, Grant's Pass, August 23, 1904, and at the same 

 locality and time by A. Rehder, seem to me to belong rather to S. 

 argophylla than to S. sessilifolia. In British Columbia, West- 

 minster County, New Westminster, banks of Fraser River, /. K. 

 Henry collected good material on June 24, 191 2, and May 9 

 and September 25, 1914 (m., fr., st.; Cal.). The largest leaves I 

 have seen measure up to 9:2 cm. 



2b. S. SESSILIFOLIA var. Hindsiana And. in Ofv. K. Vet.-Akad. 

 Forh. 15:117. 1858; in Proc. Am. Acad. 4:56 (Sal. Bor.-Am. 11). 

 1858; in Walp., Rep. Bot. 5:746. 1858; Bebb in Watson, Bot. 

 Calif. 2:85. 1879; Sargent, Rep. For. N. Am. loth Census U.S. 

 9:169. 1884, excl. synon. var. tenuifolia; Eastwood, Handb. Trees 

 Calif. 38. 1905.— 5. Hindsiana Benth. PI. Hartw. 335. 1857; 

 Torrey in Pacif. R.R. Rep. 4^:138. 1857; Newberry in Pacif. 



