Planta summe polymorpha. A Tanai (Don) Bashkiria, regione Altaica et Jemisea prope Kraznojarsk
incipiens, partem meridionalem Gub. Ircutensis et Kamtschatka occupant atque per Americam septentrion-
alem late sese extendit.
Had. y. North-West coast of America, Fort Vancouver, and Straits of de Fuca. Dr. Scouler. Rapids
of the Columbia. Douglas.—5. et ?. Throughout Canada, from Lake Huron, (Dr. Todd,) to Hudson’s Bay,
(Michaux, Douglas,) along the Saskatchawan to the Rocky Mountains, Dr. Richardson, Douglas, Drummond:
and thence to the Arctic Circle. Dr. Richardson.—(I think this species will be found to be the A.
Canadensis of Nuttall, if not of Michaux; the former compares it with A. campestris, and says it is Pursh’s
plant of that name. It certainly is that of Dr. Richardson: and the A. virgata, Rich., quoted by Dr. Besser,
is the A.frigida.—H.)
20. A. huttalhana (Bess.); suffruticosa, calathidibus racemoso-paniculatis globosis,
periclinii squamis exterioribus lineari-oblongis marginatis, caule erecto, panicula patula, foliis
glabris, inferioribus...... ., caulinis basi indivisis trifidis, laciniis ramisque lanceolatis acutis.
Bess. Monogr. Art. ined. cum ic. Bess. Dracunc. MSS.
Ab affinibus A. caudata et A. Ammanniana differt foliis laciniisque lineari-lanceolatis acutis, ab illis et
A. desertorum periclinii squamis exterioribus lineari-oplongis sequilongis omnibus lateribus scariosis; a prima
panicula magis patula, ramulis apice foliisque cinereis subcericeis; a prima et tertia, foliis caulinis 3-fidis, nec
3-7-partitis ut in desertorum. Specimina quae vidi sunt 1£' quorum panicula ipsa marimam partem occupat.
Folia longa laciniis, latis. Calathidibus sat affinis A. Dracunculo.
Hab. Red River. Douglas, in Herb. Lindl.
21. A. Dracunculus; suffruticosa, calathidibus racemoso-paniculatis globosis, periclinii
squamis exterioribus oblongis marginatis, caule erecto, foliis radicalibus apice trifidis, caulinis
lanceolatis lineari-lanceolatisve integerrimis.—Linn. Sp. PI. p. 189. Bess. Dracunc. MSS.
—d. glauca; fastigiata. Specimen unicum est 1^', caule rubro, ramis fastigiatis (an destruc-
tione apicis caulis?) junioribus incanis. Folia lanceolata, glaucescentia, at vix pubescentia
8"-" longa, V" lata, rami tecti racemis vix 1", apice cernuis, infimis 2", calathidia V",
periclinii squamae interiores late scariosae. Flosculi flavi.
Hab. Plains of the Saskatchawan. Drummond.
22. A. borealis; herbacea caespitosa villoso-sericea vel glabra, calathidibus spicato-
racemosis rarius paniculatis hemisphaericis, periclinii squamis ellipticis scariosis, caule
simplici, foliis (exceptissummis,) petiolatis, radicalibus lineari-lanceolatis integerrimis, apice
3-5-fidis pinnatisectis bipinnatisectis imo supra decomposito-sectis, laciniis lanceolatis
linearibus vel filiformibus, caulinis bipinnatisectis pinnatisectis 5-3-fidis vel linearibus
integerrimis.—Pall. It. v. 3. App. n. 129. t .H .h . f 1. Less, in Schlechtend. Linncea, v. 6. p.
211. Bess. Dracunc. MSS. Hick, in Frank!. 1st Joum. ed. 2. App. p . 30. Hook, et Am. in
Bot. o f Beech. Voy. v. 1. p. 125.—a. Purshii; sericea, cinerea; folia radicalia lineari-lan-
ceolata integerrima, vel apice 3-5-fida: caulina et floralia linearia: calathidia inferiora
pedunculata, superiora subsessilia; periclinii squamae villosse, medio fuscescentes, flosculi
nudi. Caulis adscendens 6//, violaceus, supeme villosissimus. A. spithamaea. Pursh, FI. Am.
v. 2. p. 522; folia prioris glaberrima: caulina imo floralia inferiora 5-3-fida; calathidia omnia
subsessilia, periclinii squama glabrae, medio virides. Caules erecti vel obliqui, 3-5, violacei,
basi pedicellique albo-villosi.—y. Wormskioldii. (Bess. Monogr. Art. ined.) incana, subsericea:
folia radicalia longe petiolata 3-5-fida, laciniis 3-2-fidis, rarius 5-fidis vel indivisis, lineari-
lanceolatis 5"; caulina inferiora iis similia, minora et brevius petiolata: floralia 5-3-secta
vel simplicissima linearia: calathidia racemosa, e singula axilla gemina, altero subsessili,
pedunculi infimi 2-3-flori; periclinii squamae medio fuscae, flosculi $ apice pilosuli.
Caulis IS''.
Hab. Labrador. Kohlmeister. Dr. Morrison. Arctic Shores of North America. Dr. Richardson. Rocky
Mountains. Drummond.—-y. Columbia River and Islands, North-West America. Douglas. Dr. Scouler.
Kotzebue’s Sound. Messrs. Lay and Collie.
There are still some specimens in my collection, which, from the extreme difficulty in characterizing the
species of this Genus, and the want of more perfect individuals, I am obliged to leave undetermined. Mr.
Pursh gives the “ A. Chinensis; foliis inferioribus cuneiformibus obtusis trilobis, superioribus linearibus
obtusis, floribus globosis pedunculatis cernuis,” (Willd.), as a native of the North-West coast, upon the
authority of Mr. Lambert’s Herbarium. I possess the true plant, gathered in Kamtschatka by Chamisso,
but I have seen no American specimens. (H.)
46. TANACETUM. Linn.
Capitulum homogamum aut heterogamum, floribus $ uniserialibus in ambitu, reliquis
$ fertilibus. Achenium angulatum, disco epigyno magno. Pappus coroniformis, minutus
et hinc inde subnullus, sequalis aut latere exteriori parum manifestior.—Herbae per totam
orbem terrarum disperse foliis altemis, varie sectis; capitulis solitariis aut corymbosis aut
corymboso-paniculatis, imbricatis ; rachide magis minusve convexa, nuda. Less.
1. T. vulgare; capitulis heterogamis corymbosis, foliis bipinnatifidis segmentis lanceolatis
inciso-serratis.—Linn.—Engl. Bot. t. 1229. Pursh, FI. Am. v. 2. p . 522.
Hab. Canada; probably introduced. Mrs. Sheppard.
2. T. pauciflorum; caule simplici foliis longiore subunifloro, foliis bipinnatis villosis
sessilibus, flosculis omnibus hermaphroditis. Herb. Banks.—Rich, in Frank!. Is* Jonrn. ed.
2. App. p. 30.
Hab. Woody country, between lat. 54° and 64°, North. Dr. Richardson.—“ Ulnaris. Folia bipinnanata
et tripinnatifida, laciniis angustis obtusiusculis. Flos plerumque unicus terminalis interdum alter e suprema
axilla.” Rich. L c.
3. T. ? suaveolens; capitulis homogamis, ramis unifloris, receptaculo conico involucro
longiore inferne squamoso, foliis profunde bipinnatifidis laciniis linearibus acutis basi sub-
pectinato-pinnatifidis. (Tab. CX.)—T. matricarioides. Less.Syn. Gen. Compos.—Artemisia
matricarioides. Less, in Linncea, v. 6. p. 240. (excl. syn. Tanaceti pauciflori, Rich. ?).—
Santolina suaveolens. Pursh, FI. Am. v. 2. p. 520.
Radix annua, ramosa, fibrosa. Caulis palmaris ad spithamseam, basi divisus, apice ramosus, teres, striatus,
subhirsutus, foliosus. Folia altema, sessilia, circumscriptione oblonga, bipinnatifida, vix pilosa, basi lata
pectinato-pinnatifida, laciniis linearibus angustis acutis. Rami ultimi, seu pedunculi, terminates, sub sesqui-
unciam longi, nudiusculi, striati, apice paululum incrassati, uniflori. Involucrum, ratione floris magnum,
liemisphsericum, foliolis pauci-serialibus subsequalibus, oblongis, glabris, marginibus scariosis, albis. Flosculi
omnes tubulosi, hermaphroditi, flavi, inferiores paleacei, paleis scariosis, oblongis, obtusis, superiores nudi.
Corolla brevis: tubo subtetragono compresso bialato, limbo campanulato, 3-5-dentato. Styli antheneque
inclusi. Achenium oblongum ovatumve, leve. Pappus omnino nullus.