AP0CYNACEJ1. 433 



more obtuse, and more tomentose. The fruit (which has hitherto not 

 been described) is much like that of A. cornuti, being ovate-oblong, 

 bluntly acuminate, and covered with soft subulate processes. 



2. AsclepiAS fascicularis, Decaisne. 



Asclepias fascicularis, Decaisne in DC. Prodr. 8, p. 569. 



A. macrophylla, Nutt. PI, Gamb. in Jour. Acad. Philad. (n. ser.) 1, p. 180. 



Hab. On the Willamette River, Oregon, and along the Sacramento, 

 California. 



Ord 63. APOCYNACEA 



1. APOCYNUM, Tourn. 



1. Apocynum andros^emifolium, Linn. 



Hab. On the Columbia, and its tributaries in Washington Territory 

 and Oregon ; southward to the Valley of the Sacramento. 



2. Apocynum cannabinum, Linn. 



Hab. Washington Territory to San Francisco, California. — Both 

 species extend over the whole breadth of the continent. 



109 



