Capt. Sabine. Dr. Richardson.—The latter gentlemara observes that the flowers are fragrant, probably
like those of Tussilagofragrans of our gardens, which equally belongs to the present Genus.
4. N. palmata; foliis reniformi-cordatis profunde palmato-lobatis laciniis angulatis den-
tatis subtus tomentosis.— Tussilago palmata. Ait. Hort. Kew. ed. 1. tv 3. p. 188. t. 2. Pursh,
FI. Am. v. 2. p. 331. Rich, in Frankl. 1st Joum. ed. 2. App. p. 33.
Hab. From Lake Huron, (Nuttall,) to the Bear Lake, lat. 67°, north, (Dr. Richardson, Drummond:)
and from Labrador and Newfoundland on the East, (Dr. Fothergill, Kohlmeister, Dr. Morrison;) to the
Rocky Mountains, (Drummond;) and thence to the Pacific, at the mouth of the Columbia. Dr. Scouler.
Douglas.—This and the three preceding species, it must be acknowledged, are distinguished by very slight
characters, and the numerous specimens before me, would, in the varied form of the foliage, lead to the
suspicion that they in reality constitute but one species. Of the present, in age, the leaf becomes perfectly
glabrous. In the specimens from the more elevated of the Rocky Mountains, the lobes of the leaf are broadly
cuneate, and the sinuses very obtuse.
23. ADENOCAULON. Hook.
Capitula heterogama, floribus ? paucis, uniserialibus in ambitu, reliquis $ . Cor. $. . .
Pappus 0.—Herb* perennes, Americana, glandulispedicellatis adspersce ; foliis subtus albo-
tomentosis, petiolatis; involucris uniserialibus demum rejlexis ; capitulis paucifloris, panicu-
latis, parvis. Less.
1. A. bicolor; elatum, foliis cordato-ovatis subtrilobis angulato-dentatis. Hook, in Bot.
Misc. v. 1. p. 19. t. 15.
Hab. Dense woods at the Straits of De Fuca, and about Fort Vancouver, on the Columbia. Woods
on the Portage River, one of the sources of the Columbia, in the Rocky Mountains, lat. 52° north. Drummond.—
The specimens found by Mr. Drummond are withered stems of the preceding year, and necessarily
very bad, from being collected in the depth of winter, and while the snow was deep upon the ground. A
second species of this highly curious genus has been detected in Chili by Poppig.
T r i b . IV. S e n e c io n i d e ® . Less.
Subtrib. I. A m b r o s i e ® . Capitula aut monoica aut heterogama, floribus in centro masculis.
Rachis in capitulis heterogamis bracteolata, bracteolis glabris. Anthera ecaudata.
Less.
( A. A m b r o s i e ® verse. Cor. floris ? filiformi; acheniis calvis, erostribus, involucro scope
inclvsis; stylo floris masculi clavato, truncato, apiceque solo penicil/ato. Less.)
24. XANTH1UM. Linn.
Capitula homogama, monoica; fceminea biflora, involucro hamato-spinoso cincta. Achenia
compressa, singula in loculis singulis involucri demum indurati et bilocularis nidulant.—
Herbse America vel Furopa indigena, sape spinosa ; foliis alternis, asperis, varie incisis ;
capitulis irregulariter glomerato-spicatis ; spica terminally superne mascula, basi fceminea.
1. X. Canadense; foliis profunde cordatis basi cuneatis angulatis subdenticulatis scabris,
caule maculato superne aspero, fructibus geminis hispidissimis, rostris duobus aculeisque
uncinatis. Spreng. Syst. Veget. v. 3. p. 852.—X. maculatum. Raf. in Sill. Journ. ( Torrey,
in litt.)
Hab. Canada? ' North-West coast of America. Douglas.
25. AMBROSIA. Linn.
Capitula homogama, monoica; fceminea uniflora, involucro inermi (vel spinoso) cincta;
mascula multiflora, rachide ebracteolata. Achenium globosum.— Frutices vel Herbse Asia
vel Furopa indigena, foliis alternis, inferioribus nonnunquam oppositis, integris aut sapius
divisis; capitulis spicatis, spica lineari, superne mascula, basi lobata et fceminea; involucris
capituli masculi uniserialibus, gamophyllis. Less.
1. A. elatior; foliis bipinnatifidis glabriusculis, petiolis longe ciliatis, racemis terminalibus
pauiculatis, caule virgato. Willd.— Linn.— Pursh, FI. Am. v. 2. p. 583. Elliott, Carol, v.
2. p. 47*7.
Hab. Canada. Pursh.
2. A. paniculata; pilosa, foliis bipinnatifidis summis pinnatifidis, racemis terminalibus,
fructibus supra medium spinis brevibus erectiusculis.—Mich. Am. v. 2. p . 183. Pursh, FI.
Am. v. 2. p. 581. Elliott, Carol, v. 2. p. 478.
Hab. Canada. Pursh. Lake Huron. Dr. Todd. Straits of de Fuca, and Nutka, North-West America.
Dr. Scouler.
3. A. acanthicarpa; setis asperis rigidis hispida valde ramosa, foliis bipinnatifidis seg-
mentis linearibus, racemis terminalibus, fructibus spinis rigidis subulatis longis patentibus
undique tectis.
Hab. Banks of the Saskatchawan and Red River. Douglas. Drummond. Plentiful on the sandy
banks of the Columbia, near Indian Villages and Camps, and at the Grand Rapids. Douglas.—The singularly
spinescent fruit of this species, distinguishes it from every other with which I am acquainted.
26. IVA. Linn.
Capitula heterogama, floribus fcemineis uniserialibus in ambitu, reliquis masculis. Achenium
obcompressum. Cor. ? tubulosa s. campanulata. Rachis bracteolata.— Herb* vel
Frutices Americana; foliis alternis seu oppositis, trinerviis; capitulis spicatis (nunc axillari-
bus), spica terminali solitaria lineari basi fceminea, superne mascula; involucris oligophyllis,
uniserialibus. Less.
1. I. axillaris; herbacea, foliis subcarnosis lanceolatis obtusis basi attenuates integerrimis
pilosis v. glabris, capitulis solitariis axillaribus nutantibus. (T ab. CVII.)—Pursh. FI. Am.
v. 2. p. 743.—ß. robustior; omnibus partibus majoribus.
Radix annua, parva. Caulis erectus, plerumque valde ramosus; rami erecti, angulati, glabri, vel pilosi.
Folia alterna, rarius opposita, subunciam longa, lanceolata, magis minusve lata, basi attenuata, subcarnosa,
rigidiuscula, obtusa, integerrima, glabra vel piloso-scabra, uninervia. Capitula solitaria, axillaria, brevissime
pedunculata, nutantia. Involucrum subhirsutum, e foliolis 4-5 in unicum hemisphsericum lobatnm coalitis.
Flosculi inclusi, receptaculum paleaceum, paleis linearibus sursum latioribus ciliatis: Masc. plurimi, centralis.
Cor. tubulosa, subinfundibuliformis, dentibus 5 reflexis. Antherce exsertse, inappendiculatse. Pistillum 0._
-FajTW.uniserialis in ambitu. Cor. brevis, tubuloso-filiformis, 5-dentata, Gei'men obovatum. Styli lineares,longi,
lati. Achenium late obovatum, epapposum, pubescens, nigro-fuscum, corolla persistente brevi coronatum.
Hab. Between Carlton House and Edmonton House, on the Saskatchawan. ß. Common on the
barren grounds, from the “ Grand Rapids ” of the Columbia, to the Rocky Mountains, in sandy dry soils.
Douglas.—Mr. Drummond notices this plant as having the appearance of Glaux maritima. If I am right
in referring it to Pursh’s Iva axillaris, it has probably an extensive range, his plant being found, by Bradbury,