Tab. CIX. C. integrifolium. Fig. 1, Outer ; fig. 2, Inner leaflet of the involucre ; Jig. 3, Floret of the
r a y ; fig. 4, Floret of the disk ; fig. 5, S tigm a s; fig. 6, Leaf.
4 . C.? nanum; annuum, caule subramoso laxe lanoso, lan a decidua, foliis pinnatifidis
segmentis linearibus integris, floribus terminalibus solitariis, acheniis obovato-oblongis
papulosis.
Hab. North-West coast of America. Mr. Menzies.—This was marked “ Anthémis” by Mr. Menzies
but as I do not find any scales upon the receptacle, I rather refer it to Chrysanthemum, n o tw ith s tan d in g
that the achenium is rough with minute granules or papillae. The root is small and fibrous. Stem suberect,
8-5 inches high, simple or branched, slender, partially clothed with a deciduous lax wool. Leaves scarcely
an inch long; their rachis and segments slender. Flower terminal, solitary, the size of th a t of a daisy.
Leaflets of the involucre elliptical, at length sphacelated at the extremity. Florets of the ray 8-10, apparently
white and entire at the point. Receptacle or rachis of the flower convex. I regret that I cannot
give a more full description of this interesting little plant without the destruction of th e few specimens
which I possess.
4 3 . PYRETHRUM. Willd.
Achenium exalatum, conforme, angulatum. Pappus coroniformis, diametro ei achenii
subæquali. Cor. disci » , 5-dentata, tubo incrassato, sæpius plano-obcompresso e t bialato
radii $ lingulata, lingula oblonga. Stylus disci ramis exappendiculatis. Involucrum
campanulatum. Rachis ampla.—H e rbæ velrarius frutices, per zonam temperatam australem
(proecipue) dimlgatoe, foliis alternis, rarissime oppositis, plerumque varie pinnatifidis ; cap-
itulis solitariis vel corymbosis, radio albo, rarius luteo; involucris campanulatis, imbricatis;
rachide planiuscula. Less.
I. P. irwdorum; caule diffuso ramoso, foliis bipinnatis glabris, foliolis lineari-filiformibus
2 -3 -p artitis, coronula achenii integerrima.—Sm. Engl. Bot. t. 676.—f3. nanum; caule
unifloro. Hooh. et Am. in Bot. o f Beech. Voy. v. 1. p . 126.— P . Caucasicum. Willd. (fide
Lessing.) Chrysanthemum grandiflorum. Hook, in Parry's 2d Voy. App. p . 398.
Hab. Lake Huron. Dr. Todd. York Factory, Drummond; and as far North as Bear Lake, Dr.
Richardson. 0. Shores and Islands of the Arctic sea. Dr. Richardson. Chamisso.
Subtrib. VII. A rtemisiæ. Capitula nunquam dioica, floribus marginalibus uni-s.-pluriseri~
alibus, foemineis, corollas tubulosas dut rarissime obsolete lingulatas gerentibus, ubitunc (1)
aut lingulæ ipso tubo plano-obcompresso et bialato angustiores, (2) aut flores ? pluriseriales
(3) aut achenia plano-obcompressa et orbicularia sunt, (4) aut floribus centralibus masculis
stylus simplicissimus est. Pappus aut nullus, aut coroniformis, aut e brevissimis paleis
velpilis, cellulis uniserialibus, suprapositis formatis constans. Antheroe ecaudatoe. Stylo Ç
vel $ rami semper exappendiculati. Less.
1. C otuleæ. Capitulis multifloris; corollis staminigeris tubum plano-obcompressum et
bialatum, stylumque bifidum gerentibus aut teretibus, si achenium aut corolla foeminea
et obcompressa est; rachide ebracteolata. Less.
44. OMALANTHUS. Less.
Capitulum heterogamum, floribus uniserialibus in ambitu, reliquis £ fertilibus. Achenium
exalatum, quadrigonum, conforme. Pappus coroniformis, répandus. Cor. ? ; g
glabra, plano-compressa, bialata, 3-crenata. Rachis ebracteolata.—Herba California,
facie Santolinæ, tomentosa, foliis bipinnatisectis alternis ; capitulis solitariis vel corymbosis;
involucris campanulatis, pauciserialibus ; rachide convexa. Less.
1. O. camphoratus. Less, in Syn. Gen. Compos, p . 260.-—Tanacetum camphoratum.
Less, in Linncea, v. 6. p. 521.
H a b. California. Menzies, (in Herb.nostr.) Chamisso. Columbia. Douglas. Dr. Scouler. York Factory,
Hudson’s Bay. Drummond. Douglas.—This has altogether the habit of Tanacetum vulgare ; but it is much
more robust; and it differs, as Lessing tells us, “ corollis foemineis plano-obcompressis et inferne alatis.”
2. A r t e m i s ie æ . Capitulis multifloris ; corollis staminigeris teretibus stylumque bifidum
gerentibus ; acheniis exalatis, nunquam plano-obcompressis et orbicularibus, rachide ebracteolata.
Less.
45. ARTEMISIA. Linn. .
Capitulum aut heterogamum, floribus disci ÿ , et ç in ambitu rachide villosa ( Absinthium,
Tourn.); aut floribus disci g et ? in ambitu; rachide nuda (Abrotanum, Tourn.); aut
floribus omnibus £ v. raro in medio 1 $ , rachide nuda (Seriphidium, Bess.); aut floribus
staminigeris abortu ovarii sterilibus, ç in ambitu, Tachide nuda (Dracunculus, Bess., Oli-
gosporus, Cass.) Achenium obovatum calvum disco epigyno miiiuto.— “ Herbæ per iotam
orbem terrarum disperses, foliis alternis plerumque varie pinnatifidis ; capitulis parvis pauci-
floris, luteis, spicatis, racemosis vel in paniculam pyramidalem dispositis ; involucris imbri-
catisi foliolis siccis margine scariosis.” Less.
S e c t . I. A b s i n t h i u m . Gcertn.—Bess. * Syn. Absinth., in Bulletin, de la Soc. Imp. des
Natural, de Moscow, 1829. n. 8.
1. A.frig id a ; suffruticosa, calathidibus parvis racemoso-paniculatis globosis nutantibus,
periclinii squamis exterioribus linearibus incanis interioribus oblongis lanatis, foliis incano-
sericeis caulinis pinnatisectis laciniis linearibus 3-5-fidis.— Willd. Sp. PI. v. 3. p . 1838. n.
51. Bess. 1. c. p. 251.—8. Gmeliniana; folia pollicaria radicalia longe petiolata 3-partita
segmentis 5-partitis, laciniis linearibus acutis, mediis abbreviatis ut ambitus folii sit reniformis
ob pinnulas vero intégras lineari-lanceolatas insertion!* petioli approximatas et a reliquis
remotas quasi stipulatas stipulis petiole adnatis, caulina pinnatisecta, pinnulis inferioribus ab
anterioribus valde remotis; floralia 5-secta 3-partita v. integerrima. Bess.—(Artemisia virgata.
Rich, in Frankl. 1 st Journ. App. p . 306. in Herb. Hook.)—Planta maxime polymorpha in
montium Altaicorum, ad Jenizeam circa Kraznojarsk, Dahuriæ frigidis aridis. Caules a
spithamæis ad pedal es at vix ultra. Culta ramosissima more A. camphoratce. Hue Gmelin
El. Sib. v. 2. p. 128. t. 62.—Ex autopsia speciminum ab ipso auctore in Herb. Acad. Imp.
* I am indebted to Dr. Besser himself, the learne.d Author of the “ Synopsis" here quoted, for the present Monograph
of the British North American species, which I insert, except when otherwise expressed, in his own words.
It is perhaps scarcely necessary to mention, that the term calathidium (of Cassini) is equivalent to capitulum,
or the entire compound flower, of Lessing; andpericlinium, to that of involucrum. The marks of measure, (' ff «)
attached to figures, imply, (') an inch, (")'£ an inch, (w) a line.
VOL. I. 2 S