64 



2. Potamogeton ptisillus L. var. tenuissimus Mort. & Koch. 

 In shallow water on the Polk County shore of the Willamette, 

 opposite Sidney, Marion County. Has probably been taken for 

 the species. Determined by C. A. Weatherby. 



3. *Panicum capillareh. On lawns and street-parking about 

 Salem. The indigenous species formerly referred here is P. barbi- 

 pulvinatum Nash; but our plant is plainly introduced, and well 

 matches authentic specimens of P. capillare. 



4. *Agrostis verticillata Vill. In wet sand on the shore of 

 the Columbia River on Hayden Island, Multnomah Co., opposite 

 Vancouver, Wash. Piper and Beattie regard this as identical 

 with A. stclonifera L.; but Hitchcock (U. S. Dept. Agr. Bull. 

 772: 127. 1920) has shown that two distinct species were con- 

 fused by Linnaeus. The "creeping bent" of lawns about Salem 

 should be regarded according to Hitchcock as a form of the true 

 A. stolonifera rather than of A. alba L. (now A. palustris Huds.). 

 This form is common along the shores of the Willamette, where 

 it appears to be indigenous. Determined by Agnes Chase. 



5. Eragrostis liitescens Scribn. With the last. A species in- 

 digenous to the Snake River basin of Washington and Idaho, 

 but occasionally found along the Columbia. Determined by 

 Agnes Chase. 



6. *Eragrostis mexicana (Lag.) Link. A single plant in a 

 flower-bed on Market Street, Salem. Plainly introduced, as the 

 native range is from southern Cal. southward into Mexico. 

 Determined by Agnes Chase. 



7. Carex teneraeformis Mackenzie. In dry rocky soil under 

 trees on the southwest slope of Mt. Hood, at 5000 ft. alt. Re- 

 ported by M. E. Peck from the mountains of southern Oregon. 

 Determined by K. K. Mackenzie. 



8. *Chenopodium carinatum R. Br. Prostrate on the sand 

 on Hayden Island. An Australian species that has been long 

 known in Cal., and collected by the Avriter at two stations in 

 Curry Co., Oregon in June, 1917. 



9. *Chenopodium leplophylliim (Moq.) Nutt. On parking 

 in front of the Willamette University campus at Salem. In- 

 digenous in southern Oregon. Determined by Bayard Long. 



10. * A triplex Gmelini C. A. Mey. On the sandy shore of 

 Hayden Island, associated with various other Chenopodiaceae. 

 Determined by P. C. Standley. 



