223 



13. Salix habylonica L. A large tree in low ground near stream 



in pasture, three miles west of West Salem, Polk Co. No 

 dwelling in the immediate vicinity. (Specimen deposited 

 with the Arnold Arboretum.) 



14. Abuts rhomhijolia Nutt. Not infrequent in thickets along 



streams about Salem. 



15. Polygonum aviculare L. var. vegetiim Ledeb. In yards and 

 waste places, Salem. 



16. Polygonum conjertiflorum Nutt. In dry soil, especially in 



dried mud, about Salem. Collected by Howell at St. 

 Helens. 



1 7. Polygonum hydropipei oides Michx. Common in slow streams 



and swampy ground. 



18. Spergularia sparsiflora (Greene) A. Nels. Muddy tide-flats 

 in Yaquina Bay, Toledo. 



19. Delphmium NuttalUanum Pritzel. In ballast on S. P. 



tracks, one mile south of Salem. 



20. Delphinium depaiiperatum Nutt. Not uncommon on gravelly 



prairies about Salem. 



21. lonopsidium acaule (Desf.) Reichenb. A common and 



troublesome weed in garden of Kerr estate. Elk Rock. 



22. Thysanocarpus curvipes Hook, forma madocarpus (Piper) 

 Macbr. Occasional in dry rocky soil. 



23. Brassica Rapa L. Persisting in orchards and fields — very 



common. 



24. Brassica oleracea L. var. acephala DC. Common in culti- 



vation, and often persisting in fields, etc. 



25. Lepiditim sativum L. Occasional in old gardens about Salem. 



26. Peltiphyllum peltatum (Torr.) Engler. Not collected, but 

 observed from car-window along Mary's River in Benton 

 Co. Very common in southwestern Oregon. 



27. Pyrus Malus L. A common escape to thickets and road- 



sides. 



28. Ruhus thyrsanthus Focke. A frequent escape in dry sandy 

 soil. 



29. Rosa canina L, Not infrequent along streams and roadsides. 



— Forms not typical and identity in doubt. 



