I 



130 POLYGONE^. [Polygonum. 



more southern parts of N. America. The present seems to vary considerably in the presence or absence of 

 the large grain on one or more of the valves. Bat the species is certainly very widely dispersed in British 

 N. America. 



7. R, acutus, L, — E, Bot, t. 724. Rich, -^pp* p. 11. 



Hab. Woody country. Dr Richardson. 



8. R. sanguineus. Z. — E, Bot L 1533. Ph. Am. 1. /?. 247. — 15. foliis omnino viridibus. 

 R. viridis. Sihth. — R. Nemolapathum. Ehrh. 



Hab. Barren country beyond lat. 64°. Dr Richardson. — /3. Canada. Mrs Sheppard. Newfoundland. 

 Miss Brenton. 



9. R. persicarioides. L. — Ph. Am. 1. p. 248. Hook, et Am, in Bot. Beech. Voy. p. 158. 

 an R. maritimus. L. ? E. Bot. t 725. 



Hab. Plains of Saskatchawan to the mountains. Brummond. N. W. Coast, frequent. Douglas. Hud- 

 son's Bay. Druinmond. Douglas. — Dr Arnott and myself have expressed our fears, in the place above 

 quoted, when speaking of this as a Califomian plant, that it was not really distinct from our JR. maritimus. 

 It has a most extensive range. We possess it from China, and from Port George in Patagonia. Sometimes 

 the teeth of the enlarged sepals are shorter, and then the species appears to pass into R. palustris, Sm. 



10. jB. venosus (Ph.); caule dichotomo, foliis subcoriaceis ovato-lanceolatis valde acutis 

 petiolatis parallelo-venosis, floribus hermaphroditis, sepalis int. demum reniformi-cordatis 

 reticulatis maximis integerrimis nudis. (Tab. CLXXIV.)— P^. Ain. 2. p. 733. Nutt. 

 Gen. Am. 1 . p, 240. 



Hab. Carlton House Fort on the Saskatchawan. Dr Richardson. Common throughout the barren 

 grounds of the Columbia to the source of Lewis and Clarke's River. Douglas. — A very fine and most dis- 

 tinct species, first discovered by Mr Bradbury in Upper Louisiana. The enlarged inner sepals are often the 

 size of a shilling-. 



Tab. CLXXIV, Rumex venosus. Fig. 1, Flower;/. 2, Fruits: nat. size ;~~f. 3, Single fruit':— wa^- 

 nified. 



3. POLYGONUM. Z. 



§ \. BlSTORTA."* 



1. P. Bistorta. L.—E. Bot. t. 509. Cham, et Schlecht. in Linna^a^ 3. p. 37.— P. ellip- 

 ticum. Willd. Herb. Spreng.—V. bistortoides. Ph. Am. ]. jo. 271. 



Hab. Arctic Sea-coast. Dr RicJiardson. N. W. Interior. Douglas (last journey).— Our specimens 

 seem almost intermediate between the present and following species. They have no bulbs on the spike 

 or raceme; in the Arctic individuals (4-5 inches high) the flowers are purple, the leaves ovato-lanceolate, 

 glaucous beneath. In the specimen from Douglas, the flowers appear to be white, the lowest leaves even 

 are broadly lanceolate, tapering at the base, and of nearly the same colour on both sides. ' In both, the 

 raceme is elliptical. 



2. P. viviparum. L.—E. Bot t 669. PL Am. 1. p. 271. Cha7n. et Schlecht 3. p. 38. 

 Rich. App. p. 43, 



Hab. Lower Canada (PL), to the Arctic sea-coast and islands. Dr Richardson. Sir E. Parry, ^c. 



Swampy ground in the Rocky Mountains. Drummond. Labrador. Dr Morison. Miss Breiiton. N. W. 

 America. Observatorv Tnlpt (T^v .^^/lf#7^^^ t^^ ti^i.,;^™v g*-«:*„ m. • 



