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. B . acutus. L .—E. But. t. 724. Rich. App. p. 11.
' Hab. Woody country. Dr Richardson.
8. B . sanguineus. L __E . Bat. 1.1533. Ph.Am. 1. p. 247— (3. foliis omnino viridibus.
R. viridis. Sibth.—R. Nemolapathum. Ehrh.
Hab. Barren country beyond lat. 64°. Dr Richardson—A 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. Drummond. N. W, Coast, frequent. Douglas. Hudson's
Bay. Drummond. Douglas.— Dr Arnott and myself have expressed our fears, in the place above
quoted, when speaking of this as a Californian plant, that it was not really distinct from our R . 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. R. venoms (Ph.); caule dichotomo,foliissubcoriaceisovato-lanceolatisvalde acutis
petiolatis parallelo-venosis, floribus hermaphroditis, sepalis int. demum reniformi-cordatis
reticulatis maximis integerrimis nudis. (T ib. CLXX1V.)—Ph. Am. 2. p. 733. Nutt.
Gen. Am. i.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 distinct
species, first discovered by Mr Bradbury in Upper Louisiana. The enlarged inner sepals are often the
size of a shilling.
Tab. CLXXIV. Romex venosus. Fig. 1, Flower; ƒ. 2, Fruits : nat. size;—/. 8, Single fruit -.—magnified.
3. POLYGONUM. L.
§ 1. -Bistobta.’
1. P . Bistorta. L .—E . Bot. t. 509. Cham, et Schlecht. in Linncea, 3. p. 37.—P. elllp-
ticum. Willd. Herb. Spreng.—P. bistortoides. Ph. Am. I.p . 271.
Hab. Arctic Sea-coast. Dr Richardson. 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.
a. P . miparum. L.—E. Bot. t. 669. Ph. Am. 1. p. 271. Cham, et Schlecht. 3. p. 38.
Rich. App. p. 43.
Hab. Lower Canada (Ph.), to the Arctic sea-coast and islands. Dr Richardson. Sir E . Parry, Src.
Swampy ground in the Rocky Mountains. Drummond. Labrador. Dr Morison. Miss Brenton. N. W.
America, Observatory Inlet (Dr Scouler), to Behring’s Straits. Chamisso.
• § 2 . A cMNOGONON.’
3. P. alpinum (All. Ped. t. 68. f. 1.) floribus majuseulis albis demum roseis purpureisve,
achenio calyce tecto faciebus ovato-rhomboideis laevibus, paniculis ramosis, foliis lanceo-
latis acuminatis breviter petiolatis minute pubescentibus margine ciliatis, ochreis pilosis,
caule erecto glabriusculo ramoso, ramis adscendentibus. Meisn. Polyg. p. 56. t. 3. G.
Cham, et Schlecht. in Linncea, 3. p. 38.—13. foliis ovato-acuminatis subtus pubescenti-
fuscis. Hook, et Am. in Bot. of Beech. Voy. p. 129.—y. foliis ovato-acuminatis glaber-
rimis.
H ab . 0. Kotzebue’s Sound. Chamisso. Beechey.—y. Arctic Sea-coast. Dr Richardson.
’ mj 3 . F a g o fy r um .
4. P. Fagopyrum. L.—E. Bot.t. 1044. Meisn. Polyg. p. 61. Ph. Am. 1. p. 273.
H ab . New Brunswick. Lieut. Kendal. (Probably introduced.)
| 4 . T e n ia r ia .
5. P. Convolvulus. E .—E . Bot. t. 941. Ph. Am. 1. p. 273.
H a b . Canada (Mrs Sheppard), to the Saskatchawan and Hudson’s Bay. Dr Richardson. Drummond.
Newfoundland. Miss Brenton.
6. P. cilinode (Mich. Am. 1 ~p. 241); perenne, calyce non alato, floribus parvulis
patulis, achenio calyce abscondito faciebus ellipticis utriusque attenuatis Iambus nitidis
angulis acutis, racemulis parvis subpaniculatis, ochreis basi serie ciliorum paullo deflexo-
rum coronatis, foliis margine ciliatis petiolisque retroflexis, caule ascendente scandente.
Meisn. Polyg. p. 63. t. 5. f . 18—20.
H ab. From Lake Huron (Dr Todd), throughout Canada, to the Saskatchawan and Hudson’s Bay. Dr
Richardson. Drummond.
7. P . sagittatum (L .); floribus 6-8-andris, achenio acuminato faciebus tenerrime
punctato-striatis, pedunculis communibus plerumque geminatis, foliis sagittato-oblongis,
nervo dorsali petiolis ochrearum basi angulisque caulis retrorsum aculeatis, ochreis cylindraceis
truncatis, caule prostrato aut ascendente. Meisn. Polyg. p. 65__j8. boreale ; foliis
petiolatis debilibus margine non cartilagineo-ciliatis, ciliis apicem spectantibus, ochreis
laceris margine truncato nudis, capitulis parvis sphsericis. Meisn. 1. c. Ph. Am. 1. p. 241.
Gmel. Sib. 3. p. 65. t. 13. ƒ 2.
H ab . 0. Canada, to the Saskatchawan. Dr Richardson. Drummond. Newfoundland. Miss Brenton.
| 5 . P e r s ic a r ia .
8. P. amphibium. L .—E . Bot. t. 436.—P. coccineum. Ph. Am .l. p. 271.—a. natans;
glabrum, caule riatante demerso radicante, foliis ovato-ellipticis spicisque brevibus obtusis.
Meisn. 1. c. p. 67.—P. coccineum, aquaticum. Ph. Am. 1. p. 271.—/3. terrestre ; majus,
caule ascendente, foliis pilis brevibus scabris ovato-lanceolatis spicisque elongatis acuminatis,
Meisn. 1. c. p, 67.—P. coccineum, terrestre. Ph. Am. 1. p. 271.