31 



139- Bidois Jrondosa L. Very coninioii in low gnnind through- 

 out the Willamette Valley. 



140. Coreopsis tinctoria Nutt. In waste places, Salem. 



141. Lasthenia glabcrrima DC. Dry ditches along railroad near 



Salem: also near Jefferson, Marion Co. 



142. Chrysanthemum Parthenium L. On river-banks at Salem; 



abundant along the railroad at Bridal Veil, Multnomah Co. 



143. Chrysanthemum Balsamita L., var. tanacetoides Boiss. Well 



established along the railroad near Salem. 



144. Ta7iacetum vulgare L. Common on road-sides and river- 



banks throughout the Willamette Valley. 



145. Artemisia Lindleyana Bess. On sandy shore of the Colum- 



bia opposite Vancouver, Wash. 



146. Artemisia dracunculoides Pursh. With the last. 



147. Artemisia Douglasiana Bess. Common in river-bottoms 



along the Willamette. 



148. Artemisia biennis W^illd. In railroad yards, Portland. 



149. Senecio Cineraria DC. Escaped to w^aste ground, Salem. 



150. Senecio Jacohaea L. In railroad yards, Portland. 



151. Cirsium arcense (L.) Scop., var. wz7e Wimm. & Grab. With 



the last. 



152. Cnicus benedictus L. Borders of fields and on roadsides, 



south of Salem. 



153. Lactuca Scariola L. Common in fields and waste places 



about Eugene and Salem, associated with the var. inte- 

 grata Gren. &: Godr. 



The species that occur only as ballast-plants (about 75 in num- 

 ber) are not included in the above list, since an enumeration of 

 these has appeared in a recent number of this journal.* 



Of the 153 species listed above, 92, or 60 per cent, of the total, 

 are undoubtedly introduced; the remaining 40 per cent, seem to 

 be indigenous, though in the case of several this cannot be affirmed 

 with certainty. The total number of species and named varieties 

 mentioned in the Flora of the Northwest Coast is 1617. It does 

 not seem unreasonable to assume that this number can be brought 

 up to tw^o thousand after a more thorough survey of the field. 



The following extensions of range beyond the limits assigned 



♦September, 191 7. 



