2. S. Canadensis; spicis longis cylindricis (albis), staminibus longe exsertis, filamentis
superne dilatatis, foliolis ovato-oblongis subcordatis grosse serratis.—Linn. Sp. PL p. 169.
Mich. Am. v. 1. p. 100. Pursh, Fl. Am. v. 1. p . 126. Elliott, Carol, v. 1. p . 206.* Torrey,
FI, o f Un. St. v. 1 p , 176. Bigel. Fl, Bost. ed. 2, p. 62. De Cand, Prodr. v. 2. p. 594.—
ß. latifolia; foliolis brevioribus latioribus.
Hab. Canada, about Quebec. Michaux, Mrs. Sheppard, Mrs. Percival. Newfoundland. Dr. Morrison,
ß. Observatory Inlet, North-»West coast of America. Dr. Scouler. Grassy pastures in the vallies of Una-
laschka. Chamisso.
20. POTERIUM. lirm.
Flores monoid aut polygami. Cal. basi 3-squamosus, tubo apice coarctato, limbo 4-
pai tito. Pet. 0. Stain. 20-30. Ovarta 2 stylo filiform! et stigmate penicilliformi superata.
Ackenia intra calycem induratum sicca 1-sperma, Semen inversum.— Herbse aut suffrutices.
Folia impari-pinnata, foliolis serratis (vel profunde divisis.) Flores in spicas globosas
cylindraceasve dense aggregati. DC.
1. P. Sanguisorba; herbaceum, caule anguloso foliisque glabris, foliolis 4-5-jugis ovatis
subrotundisve profunde serratis, capitulis subrotundis floribus inferioribus maseulis.__Linn.
Sp. PI. p . 1411. Engl. Bot. t. 860. De Cand. Prodr. v. 2. p . 594.
Hab. Lake Huron. Dr. Todd, (in Herb, nostr.)
2. P. annuum; herbaceum annuum glabrum, caule erecto dichotomo, foliolis 4-5-jugis
ovatis profunde pectinato-pinnatifidis, laciniis lineari-angustissimis, capitulis ovalibus (uni-
sexualibus?)—Nuttall, MSS. in Herb, nostr.
Radix parvas, annua. Caulis erectus, strictus, gracilis, pedalis ad bipedalem glaber, plerumque dicho-
tome ramosus. Folia plurima, glabra. Foliola 4-5-juga, circumscriptione ovata, ad costam usque pectinato-
pinnatifida, laciniis angustissimis linearibus. Capitula ternunalia, elliptica, ut videtur flavescenti-purpurea,
unisexualia? - ’
Hab. Rocks near the “ Grand Rapids,” on the plains of the Multnomak, frequent. Douglas.—The
same very distinct species I have received from Mr. Nuttall (who gathered it upon the Red River, in Louisiana)
as the P. annuum of his MSS.: a name, therefore, which I gladly adopt.
T rib. V. RosEis. DC.
2L ROSA. Toum.
Calycis tubus apice contractus, limbo 5-partito, lobis per sestivationem apice subspiraliter
imbricatis ssepe pinnatim sectis. Pet, 5. Stam. 00. CarpeUa plurima, calycis tubo
demum baccato inserta, et in eo inclusa, sicca indehiscentia subcrustacea, e latere interiore
stylum gerentia, styliß e calycis tubo coarctato exsertis,. nunc omnino liberis, nunc in stylum
columnarem accretis. Semen in achenio solitarium exalbuminosum, inversum. Embryo
rectus, cotyledonibus plamusculis.— Frutices aut Arbusculse ; foliis scepius impari-pinnatis,
foliolis serratis, stipidis petiolo adnatis. DC.
Div. I. CiNNAMOMEiE. Setigerce vel inarms bracteatce. Foliola lanceolata eglandulosa.
Discus tenuis nequaquam incrassatus. Lindl.
1. R. nitida; pumila, armis confertissimis gracilibus, foliolis nitidis anguste lanceolatis
planis. Lindl.— Willd. Enum. p . 544. Pursh, FI. Am. v. 1. p. 344, et in SuppL p. 749. Lindl.
Ros. p . 13. t. 2. De Cand. Prodr. v. 2. p . 603. Torrey, FI. o f Un. St. v. 1, p* 485.—R.
blanda. Pursh, FI. Am. v. 1. p . 344. (non Ait.)
Hab. Newfoundland. (Herb. Banks.) Dr. Morrison, Mr. Carmack, Sir Alexander Cochrane.
2. R. lucida; compacta, aculeis ramorum stipularibus, foliolis oblongis imbricatis planis
lucidis, fructu depresso-globoso. Lindl.—“ Ehrh. Beitr. 4. 22.” Jacq. Frag. p . 71. t. 107.
f . 3. Pursh, FI. Am. v. 1. p . 344. Elliott, Carol, v. 1. p. 563. Lindl. Ros. p . 17. Torrey,
FI. o f Un. St. v. 1. p . 485. De Cand. Prodr, v. 1. p. 602.—Dill. Elth. p . 325. t. 245. f . 316. '
Hab. Newfoundland. Sir Alexander Cochrane.—In those specimens which I have received from Sir
A. Cochrane, the calyx-tube is naked.
3. R. Woodsii; stipulis sepalisque conniventibus, foliolis oblongis obtusis glabris. lin d l.
Ros. p. 21. De Cand. Prodr. v. 2. p. 604. Lindl. in Bot. Reg. t. 976.
Hab. North of the Saskatchawan, as far as Bear Lake. Dr. Richardson.t—Of this there is what Mr.
Borrer considers a var., with the leaves downy beneath, gathered about Cumberland-House Fort by Mr.
Drummond.
4. R. Carolina; stipulis convolutis, foliolis lanceolatis, sepalis patentibus. Lindl.~Linn.
Sp. P l. p . 703. Pursh, FI. Am. v. 1. p . 341. Elliott, Carol, v, 1. p . 565. Lindl. Ros. p. 23.
t. 4. Torrey, FI. o f Un. St. v. 1. p. 486. De Cand. Prodr. v. 1. p. 605.—R. Caroliniana.
Bigel. FI. Bost. ed. 2. p . 197.—R. Pennsylvania. Mich. Am. v. 1. p. 296.
Hab. Canada, and as far as the Saskatchawan. Dr. Richardson, Drummond.
5. R. blanda; elatior, armis deciduis, foliolis oblongis planis, petiolo piloso. Lindl.-—
Ait. Hort. Kew. ed. 1. v. 2. p. 202. Lindl. Ros. p . 25.—R. fraxinifolia, a. De Cand. Prodr.
v. 2 ,p . 606.
Hab. “ North-West coast of America.” * Menzies, (in Lindl.) Hudson’s Bay, (Herb. Banks.) Canada, and
as far north as the Bear Lake. Dr. Richardson, Drummond.—The specimens in the Collection accord with an
authentic one in my Herbarium from Mr. Lindley. “ It varies, however, in the abundance of glands on the
underside of the leaves and stipules, nor do I know how R. acicularis, Lindl. (Ros. p. 144. t. 8,) is to be distinguished.
There are specimens from Cumberland-House Fort, gathered by Dr. Richardson, in which the
shoots are almost as large and prickly as in R.ferox, but not downy. There is, too, a var..foliolis latioribus
serraturis dorso crenatis, gathered near Bear Lake by Capt. Back and Lieut. Kendal.—Mixed with R. blanda,
and its broad leaved var. is a Rose unknown to me, of a similar pale hue, with very numerous nearly equal
setaceous prickles, petioles slightly hairy, and with a few prickles and setae, leaflets very obtuse, coarsely,
sharply, and simply serrated, and naked on both sides. It is probably a species.” Borrer.
6. R. fraxinifolia; elatior inermis, ramis strictis glaucescentibus, foliolis opacis undu-
latis impubibus. Lindl.—“ Bork. Holz. 301.” Ker. in Bot. Reg. t. 458. Lindl. Ros. p . 26.
De Cand. Prodr. v. 2. p. 606.
Hab. North-West coast of America. (De Cand.) Menzies, (in Herb, nostr.) Douglas, Dr. Scouler.
Newfoundland, (Herb. Banks.)—In De Candolle’s Prodromus this is stated to be exclusively a native of the
North-West coast of America. My specimens are all from that country, and well aceord with the figure in
the Bot. Register, above quoted^ M. Seringe unites the R. blanda of Hortus Kewensis with the present
species.
* This station probably belongs to the following species.