446 PHANEROGAMOUS PLANTS. 



3. POLYGONUM, Linn. 

 1. Polygonum paronychia, Cham. & Schlect. 



Hab. Puget Sound, and southward to San Francisco ; on the sea 

 beach. — A well-characterized and rather showy species ; remarkable 

 for its woody stem, large dense spikes, and thick re volute leaves, the 

 midrib of which is channelled and ciliolate on each side. The Poly- 

 gonum which Drummond found in West Florida, and which Hooker 

 thought might be this species, is probably P. glaucum of Nuttall, 

 which most botanists regard as only a variety of P. aviculare. 



2. Polygonum aviculare, Linn. 



Var. scabrellum : diffusum; ramulis geniculatis scabris, foliis ovatis 

 utrinque acutis. 



Hab. Puget Sound and Upper Columbia, southward to the Valley 

 of the Sacramento. Var. scabrellum, Satchap River, a tributary of 

 the Chihalis, Washington Territory. [This now is P. minimum, 

 S. Watson.] 



3. Polygonum tenue, Michx. 



Hab. Upper Columbia and its tributaries, and eastward to Puget 

 Sound. — Flowers rose-color, larger than in the plant of the Eastern 

 States, the sheaths also longer. [It is mixed with P. coarctatum.'] 



4. Polygonum coarctatum, Dougl. in Hook. 



Hab. Interior of Washington Territory, and Valley of the Sacra- 

 mento, California. [The specimens are in part P imbricatum, Nutt. 

 (Washington Territory), and those of California are P. Bolanderi 

 of Brewer.] 



