226 



6o. Achillea Millefolium L. var. nigrescens E. Mey. Common 

 on sand-dunes about Newport. 



6i. Chrysanthemum maximum Ramond. Common in cultiva- 

 tion, and frequently escaping to waste places, Salem. 



62. Artemisia Absinthium L. Occasional in vacant lots, Salem. 



63. Senecio Bolanderi Gray. On damp clififs along the beach 

 at Newport. Common in southwestern Oregon. 



64. Micropus calif or nicus Fisch. & Mey. Abundant on a dry 

 rocky hillside six miles southeast of Salem. Also near 

 Orville, Marion Co. Abundant in southwestern Oregon. 



65. Centaurea Jacea L. In waste ground on campus of Willa- 

 mette University, Salem. 



66. Centaurea consimilis Boreau. In waste ground, Eugene. 

 Also collected on ballast at Linnton. 



Thirty-three of the above list, or exactly 50 per cent, are 

 clearly introduced ; the other 50 per cent seem to be native. 



This list of 66 species, added to the 153 reported in my former 

 article, gives a total of 219 species that find no mention in the 

 latest manual professing to cover this region. About 125 of 

 these, or approximately 57 per cent, may be regarded as intro- 

 duced. The prediction that the original 16 17 species of the 

 Flora of the Northwest Coast could be raised to two thousand 

 by a more thorough survey of the field seems nearer realization 

 than ever; for there is no reason to suppose that the field has 

 been yet exhaustively studied, or that the introduction of foreign 

 species has been checked. 



REVIEWS 



Perns of Tropical Florida'*' 



One of the most interesting floristic regions of the United 

 States is the southern tip of Florida, the only portion of our area 

 in which the flora of tropical America is at all largely represented. 

 No botanist knows this region so well as Dr. Small; and his sum- 

 ming up of our knowledge, to date, of even one of the predomi- 



* Small, J. K. Ferns of Tropical Florida. Pp. ix + So. 5 half-tone plates 

 and S3 text-figures. New York, published by the author. 1918. Price $1.55. 



