P0LYG0NACEJ1. 447 



5. Polygonum polygaloides, Meimer in DC. 



Hab. Between the Spokane and Kooskooskee Rivers, Washington 

 Territory ; in wet places. — A remarkable species, and appropriately 

 named by Meisner. The whole plant scarcely six inches high ; the 

 stem mostly simple and very slender. Spikes few-flowered. Bracts 

 obovate-oblong, obtuse, with a broad white somewhat crenulate bor- 

 der, the central part thick and greenish, with a narrow keel on the 

 exterior side, and a free border next the flowers. 



6. Polygonum acre, H. B. K. 



Hab. Valley of the Lower Sacramento, California. — A common 

 species in most parts of the United States and Mexico, as well as 

 South America. Achenia mostly triangular, but sometimes lenticular. 



7. Polygonum amphibium, Linn. 



Hab. Yar. aquaticum, Linn., near Nisqually, Puget Sound. Var. 

 terrestre, Leers, California, in the Valley of the Lower Sacramento. 



8. Polygonum nodosum, Pers. 

 Hab. Valley of the Upper Sacramento ; common in moist places. 



9. Polygonum viviparum, Linn. 



Hab. Upper Columbia and Kooskooskee Rivers ; common in wet 

 places. 



4. R U M E X, Linn. 



1. Rumex mafjtimus, Linn. 



Hab. Shores of Puget Sound, and in other parts of Washington 

 Territory, not confined to the neighborhood of the sea; southward to 

 the coast of California. 



