January 20, 1916 345 



A LIST OF ORKGON PLANTS NOT MENTIONED 

 IN THE LOCAL MANUALS 



By J. C. NEL.SON 



In the course of a ?on:e\vliat desultory attempt to becoine 

 fatniliar with the flora of the Wilaniette valley and adjacent sec- 

 tions of we.vtern Ore<^on dniing the past season, I have been sur- 

 prised to find lu)w many planls occur that are ncjt lis'ed in the 

 local numuals — Howell's I-'lora of Northwest America; Piper's 

 Flora of Washington; Frye & Riggs Northwest Flora. The 

 great ni ijorily of these are introduced species, and in some cases 

 are not \et fully established; but the conditions for plant gtowili 

 are very favorable in this region, and it seems reasonable to ex- 

 pect that most of the plants listed below will become permanent 

 additions to the floia of Oregon. 



In the determination of these species 1 have in very few 

 cases trusted to my own unaided judgment. I am indebted for 

 the determination of the sedges to Mr, Kenneth K. Mackenzie 

 of New York City; for the grasses to Professor A, S. Hitchcock 

 and Mrs. Agnes Chase of the Bureau of Plant Industry, Wash- 

 ington, D. C, and for the ballast plants to Messrs J. E- Mac- 

 bnde and F. J. Smiley of the Gray Htibariinn of Harvard Uni- 

 versity, to all of whom I take this occasion of expressing my 

 sincere thanks. I alsj express my obligation to Professor A. R. 

 Sweetser of the University of Oregon, and Miss Ethel Sanborn 

 Curator of the University herbaiium, for the piivilege of con- 

 sulting the very complete collection of Oregon plants deposited 

 in the herbaiium at Eugene, and for many valuable suggestions 

 in regard to doubtful or difEcult species. Specimens of all 

 ''first appearances" have been deposited either in the Gray Her- 

 barium or in the National Herbarium at Washington. 



1 Paspalum DILATATUM Poir. On sand ballast, Linnton. 



2 Panicum barbinodr Trin, With the last. Not in 

 flower on October 9th, but easily recognized by its long stolons 

 and strongly bearded nodes. 



