314 C0MP0S1TÆ. [Bidens.
32. BEDENS. Linn.
Achenium exalatum, subcompressum. Aristce pappi retrorsum hispidæ, 2-5, persistentes.
—Herbæ rarius Frutices, per totam zonem æquinoctialem et meridionalem divulgatcej foliis
integris vel varie sectis, ramisque oppositié ; capitulis terminalïbus solitariis. vel corymbosis,
discoideis vel radiatis, radio luteo vel albo ; involucris polyphyllis; biserialibus, foliolis
exterioribus patentïbus ; rachide plana. Less.
1. B. cemua ; floribus subradiatis cernuis, involucri foliolis exterioribus flore longioribus,
foliis lanceolatis subconnatis serratis.—Linn.—Engl. Bot. t. 399. Pursh, Fl. Am. v. 2. p.
566.—W. minima.
H ab. Throughout Canada ; from Lake Huron, (Dr. Todd'), to the Saskatchawan ; Dr. Richardson.
Drummond.—/3. Island of Orleans, in the St. Lawrence. Mrs. Sheppard.—In this and the following, the
stems are often partially clothed with short, coarse, and thick white hairs.
2. B. chrysanthemoides ; floribus radiatis cernuis, radio involucro subæquali triplo
longiore, foliis oblongis utrinque attenuatis dentatis basi connatis. Ph.—Mich. Am. v. 2. p.
136. Pursh, FI. Am. v. 2. p. 566. Elliott, Carol, v. 2. p. 429.
H ab. Fort Vancouver (Douglas) and Straits of de Fuca, on the North-West coast. Dr. Scouler.—
These specimens are larger, and the leaves broader than in B. cemua ; but I do not think that the two
species are distinguished by any decided characters.
3. B. frondosa ; floribus discoideis, involucro foliolis exterioribus foliaceis flore multo
longioribus, foliis ternatis (inferioribus quandoquè pinnatis) foliolis lanceolatis serratis.—
Linn.—Mich. Am. v. 2. p. 136. Pursh, FI. Am. v. 2. p . 566. Elliott, Carol, y. 2. p . 431.
H ab. Canada, (Mrs. Percival), to the Saskatchawan. Dr. Richardson. Drummond.
4. B . connota ; floribus discoideis, involucri foliolis exterioribus flore sublongioribus,
foliis tripartitis (inferioribus quandoque pinnatis) foliolis lanceolatis serratis.— Willd. Sp.Pl.
v. 3. p . 1718. Pursh, FI. Am. v. 2. p . 566. Elliott, Carol, v. 2. p. 430.
H ab. Woodfield, near Quebec, (Mrs. Sheppard), to Cumberland House; on the Saskatchawan. Drummond.—
In my specimens, both of this and the preceding, the leaves are all temate, and they only differ in the
relative length of the outer leaflets of the involucre.
5. B. pilosa ; floribus discoideis, involucri foliolis exterioribus longitudine interiorum,
foliis inferioribus pinnatis, superioribus ternatis, foliolis oblongis, terminali lanceolato
reliquis duplo longiore. Willd.—Linn. Sp. PI. p. 1166. Pursh, FI. Am. v; 2, p. 566. Elliott,
Carol, v. 2. p. 431.
H ab. La Grande Chaudière. Pursh.
Subtrib. V. Helenieæ. Capitula nunquam dioica ; si heterogama, floribus ç vel neutris
uniserialibus in ambitu corollasque lingulatas gerentibus, reliquis $ . Pappus multipaleaceus,
perfectus, regularis, aut cequalis aut subcequalis, ubi tunc rami styli $ apice
truncati sunt, paleis integris sive plumoso-fimbriatis seu pinnatisectis. Antheroe ecaudatce.
Achenium erostre. Involucrum polyphyllum. Less.
1. Gaillardieæ. Nutt. Pappi paleis integris, rachide ébracteolata aut tantum margine
bracteolata. Less.
Trichophyllum.] COMPOSITÆ. 315
33. GAILLARDIA. Foug.
Radius neuter. Palece pappi uninervise, in aristam longe acuminata;. Stylo hermaphro-
dito rami appendiculati. Rachis tota ebracteolata.—Herbae Boreali-Americano, foliis
alternis, inferioribus inciso-dentatis; capitulis solitariis, longe pedunculatis, termvnalibus,
disco brunneo, radio luteo. Less.
1. G. bicolor; pubescenti-hirsuta ramosa, foliis oblongo-lanceolatis radicalibus sinuato-
pinnatifidis in petiolum attenuatis superioribus sessilibus sinuato-dentatis, radio bicolori.—
Lam. Encycl. v. 2. p . 585. Pursh, FI. Am. v. 2. p . 572. Elliott, Carol, v. 2. p . 449. Sims,
Bot. Mag. t. 1602.—Gaillardia lanceolata. Mich. Am. v. 2. p. 142.—Virgilia helenioides.
L ’Herit.—Sm. Ex. Bot. t. 37.—/3. flore minore.
Hab. a. and /3. Lake Winipeg to the Saskatchawan and the Rocky Mountains. Dr. Richardson.
Douglas. Drummond.—fi. chiefly in mountain Prairies on the East side of the Rocky Mountains, and on the
tributary streams of the Columbia on the West side. Douglas.
2. G. aristata; pubescenti-hirsuta ramosa, foliis oblongo-lanceolatis, inferioribus sinuato-
pinnatifidis in petiolum attenuatis, superioribus sessilibus integerrimis, radio unicolori.—
Pursh, FI. Am. v. 2. p . 573. Lindl. Bot. Reg. 1.1186. Hook. Bot. Mag. t. 2940.—Gaillardia
bicolor, var. Nutt.—Spreng.
Hab. Common on the undulating dry soils of the Columbia, from the Ocean to the Rocky Mountains:
very plentiful where timber has been burned. Douglas. Dr. Scouler.
34. BAHIA. Lag.
Radius-% aut nullus. Palece pappi lineares, truncatae, insequales, muticse. Stylus
exappendiculatus. Rachis tota ebracteolata.— Frutices vel herbae Americas meridionali (et
Boreali) indigeni, foliis alternis vel oppositis, plerumque subtus tomentosis, pinnatifidis vel
crenato-lobatis ; capitulis corymbosis vel subglomeratis ; involucris cylindraceis, pauciseriali-
bus ; rachide plana, scepe paleaceo-fimbrillifera. Lag.
1. B.artemisicefolia; foliis alternis sessilibus profunde pinnatifidis subtus niveo-tomentosis
margine revolutis, capitulis fasciculatis inaequalifloris heterogamis, involucris 9-phyllis
1-serialibus cylindraceis. Less, in Linncea, v. 6. p. 253.
H ab. North California, Mr. Menzies: at St. Francisco. Chamisso (in Herb, nostr.)
35. TRICHOPHYLLUM. Nutt. (Eriophyllum? Lag.)
Radius foemineus. Palece pappi sequales, obovatae, obtusae, muticse. Stylus exappendiculatus.
Rachis tota ebracteolata.—Herbae Americanos, foliis alternis s. oppositis, integris
s. palmato-pinnatifidis; capitulis luteis, terminalibus, solitariis, pedunculatis; involucris
polyphyllis. Less.
1. T.lanatum; foliis oppositis pinnatifidis subtus prsecipue tomentosis laciniis remotis
marginibus revolutis.—Nutt. Gen. Am. v. 2. p. 166.—Actinella lanata. Pursh, FI. Am. v.
2. p . 560.—Eriophyllum csespitosum. Dougl. in Bot. Reg. t. 1167.
H ab. Kooskoosky River. M. Lewis. Near the sources of the Columbia River. M. Lewis. Common on dry
sandy or gravelly soils, from the head sources of the Columbia to the Western Ocean. Douglas. Dr. Scouler.
2 R 2