COMPOSITE. * 361 



48. ACHILLEA, Linn. 



1. Achillea Millefolium, Linn. 



Hab. Abundant in Washington Territory, Oregon, and California, 

 apparently even more so than in Eastern North America, where it is 

 rarely met with in situations which show it to be unequivocally in- 

 digenous. 



49. MATRICARIA, Linn, 



1. Matricaria (Anactidea) discoidea, DC. 



Hab. Interior of Washington Territory, between Spokane and Fort 

 Colville. Also (winter vestiges) Bay of San Francisco, California.— 

 This is common from California to Unalaschka, and occurs also on 

 the northeastern coast of Siberia. It has (probably recently) found 

 its way to the vicinity of St. Louis, Missouri, where, according to Dr. 

 Engelmann, it is a weed on both sides of the Mississippi. It equally 

 occurs in Sweden, where, according to Fries, it has for many years 

 abounded in the vicinity of Upsal, growing with Maruta Cotula. It 

 will be well to notice if it continues to extend its range. 



J 6< 



50. TANACETUM, Linn. 

 1. Tanacetum Huronense, Nutt. 



Hab. Coast of Washington Territory, at Gray's Harbor, &c, and 

 of California at San Francisco. — This has extended eastward to the 

 upper Great Lakes and Hudson's Bay. 



91 



