Artemisia.] COMPOSITE. 321 



glabra, plano-compressa, bialata, 3-crenata. Rachis ebracteolata. — Herba Californicay 

 facie Santolinse, tonientosa, foliis hipinnatisectls alter nis ; capitulls solitarils vel corymhosis; 

 involucris campamdatis^ pauciserialihus ; rachide convexa. Less. 



1. O. camphor atus. Less, in Syn, Geii, Compos, p. 260. — Tanacetum camphoratum. 

 Less* in Linncea, v. 6. p. 521. 



Hab. California. Menzies,(in Herh.nostr.) CJiamisso. Columhia. Douglas. Dr. Scouler. York Factory, 

 Hudson's Bay. Drummond. Dour/las. — This has altog;ether the hahit of Tanacetum vulgare ; but it is much 

 more robust; and it differs, as Lessing tells us, " corollis foemineis plano-obcorapressis et inferne alatis." 



2. Artemisieje. Capitulis muUlJioris ; corollis staminigeris teretibus stylumque hijidiim 

 gerentibus ; acheniis exalatis, niinquam plano-obcompressis et orbicular ibiis^ rachide ebracteo- 

 lata. Less, 



45. ARTEMISIA. Linn. 



Capitulum autheterogamum, floribus disci ^ , et $ in anibitu rachide villosa {Absinthium, 

 Tourn,); aut floribus disci ^ et $ in ambitu, rachide nuda {Abrotanum, Tourn.); aut 

 floribus omnibus $( v, rare in medio 1 j, rachide nuda (Seriphidivm, Bess.); aut floribus 

 staminigeris abortu ovarii sterilibus, $ in ambitu, rachide nuda {Dracunculus, Bess., Oli~ 

 gosporus, Cass.) Achenium ohovatnm calvum disco epigjno minuto. — ^^ Hevhvc per (otam 

 orbem terrarum dispersre, foliis alternis plerumque varie pinnatifidis ; capkuVis parvis pa nci- 

 JloriSy lutels, spicatis, racemosis vel in panlculam pyramidalcm dlsposltis ; involucris itnbri- 

 catis^ foliolis siccis margine scariosis," Less. 



Sect. L Absinthium. Gcertn. — Bess, * Syn, Absinth.^ in Bulletin, de la Soc, Imp, des 



Natural, de Moscow^ 1829. n, 8. 



1, A.frigida; suffi'uticosaj calathidibus parvis racemoso-paniculatis globosis nutantibus, 

 periclinii squamis exterioribus hnearibus incanis interioribus oblongis lanatis, foliis incano- 

 sericeis caulinis pinnatisectis laciniis linearibus 3-5-fidis. — Willd. Sp, PI, v. S, p, 1838. n, 

 51, Bess. L c, p. 251, — 3. Gmeliniana; folia pollicaria radicalia longe petiolata 3-partita 

 setrmentis 5-partitis, laciniis linearibus acutis, mediis abbreviatis ut ambitus folii sit reniformis 

 ob pinnulas vero integras lineari-lanceolatas insertioni petioli approximatas et a reliquis 

 remotas quasi stipulatas stipulis petiolo adnatis, caulina piiniatisectaj pinnulis inferioribus ab 

 anterioribus valde remotis^ floralia 5-secta 3-partita v. integerrima. Bess. — (Artemisia virgata. 

 Rich, in Franhl. \st Journ. App.p,S06, in Herb. Hook.)— VUnta maxime polyniorpha in 

 montium Altaicorum, ad Jenizeam circa Kraznojarsk, Dahuriae frigidis aridis. Caules a 

 spithamffils ad pedales at vix ultra. Culta ramosisslma more A, camphoralcB. Hue Gmelin 

 FL Sib, V. 2. p, 128. t, 62. — Ex autopsia speciminum ab ipso auctore in Herb, Acad. Imp, 



• lam indebted to Dr. Besser himself, the learned Author of the " Synopsis" here quoted, for the present Mono- 

 graph of the British North American species, which I insert, except wbeu 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 Bower, of Lessing ; and periclinium, to that of involucrum. The marks of measure, (' " '") 

 attached to figures, imply, (0 an iuth, (") | an inch, ('") a line. 



VOL. I. 2 S 



