320 COMPOSITiE. [ Omalanthus. 



Tab. CIX, C. Integ^rifolium. Fig. 1, Outer; ^^r. 2, Inner leaflet of the involucre;/^. 3, Floret of the 

 ray J fig. 4, Floret of the disk j fig. 5, Sti^rmas ; fig. 6, Leaf. 



4, C? nanum; annuum, caule subramoso laxe lanoso, lana decidua, foliis pinnatifidis 

 segnientis linearibus iiitegris, florlbus termiiialibus solitariis, acheniis obovato-oblongis 

 papulosis. 



Hab. North -West coast of America. Mr. Menzies. — This was marked " Anthemis'* by Mr. Menzies, 

 but as I do not find any scales upon the receptacle, I rather refer it to Chrysanthemum, notwithstandino- 

 that the achenium is rough with minute granules or papillae. The root is small and fibrous. Stem suberect, 

 3-5 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, soUtary, the size of that of a daisy. 

 Leaflets of the involucre elliptical, at length sphacelated at the extremity. Florets of the ray 8-10, appar- 

 ently 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 the few specimens 

 which I possess. 



43. PYRETHRUM. Willd. 



Achenium exulatum, conforme, angulatum. Pappus coroniformis, diametro ei achenii 

 subtequali. Cor. disci ^ , S-dentata, tubo incrassato, s£Epius plano-obcompresso et bialuto, 

 radii ? lingulata, liugula oblonga. Stylus disci ramis exappendiculatis. InvolucTUm 

 campanulatum. Rachis ampla. — Herbse velrarius frutices, per zonam temperatam australem 

 {pr(Ecipue) divulgatce, foliis alternis, rarissime oppositis^ plerumque varie pinnatifidis ; cap- 

 itulis solitariis vel corymbosis^ radio albo^ rarius luteo; involucris campamdatis^ imbricatis • 

 rachide planiuscula. Less. 



1. P. inodorum; caule diffuso ramoso, foliis bipinnatis glabris, foliolis lin ear i-fili form ibus 

 2-3-partitis, coronula* achenii integerrima. — Sm. EngL Bot. A 676. — /3, nanum; caule 

 unifloro, Hooh. et Am. in Bot. of Beech. Voy. v. \. p. 126. — P. Caucasicum. Willd, (fide 

 Lessing.) Chrysanthemum grandiflorum. Hook, in Parry's 2d Voy. App. p. 398. 



Hab. Lake Huron. Br. Todd. York Factory, Drummond; and as far North as Bear Lake I>r. 

 Richardson. /3. Shores and Islands of the Arctic sea. Dr. Richardson. Chamisso. 



Subtrib. VII. Artemisia. Capitula nunquam dioica, florlbus marginalibus uni-s.-pluriseri- 

 alibuSifcemineis, corollas tubulosas aut rarissime obsolete lingulatas gerentibus, ubitunc (1) 

 aut Unguis ipso tubo plano-obcompresso et bialato angustiores, (2) autflores $ pluriseriales^ 

 (3) aut achenia plano-obcompressa et orbicularia sunt, (4) autfloribus centralibus masculis 

 stylus simplicissimus est. Pappus aut nullus, aut coroniformis, aut e hrevissimis paleis 

 vel pills, cellulis miser ialibus, suprapositis formatis constans. Antherce ecaudatce. Stylo ^ 

 vel $ rami semper exappendiculati. Less. 



1. CoTULE^. Capitulis multifloris; corollis staminigeris tubum plano-obcompressum et 

 bialatum, stylumque bifidum gerentibus aut teretibus, si achenium aut corolla fmninea 

 et obcompressa est; rachide ebracteolata. Less. 



44. OMALANTHUS. Less. 



Capitulum heterogamum, floribus uniserialibus in ambitn, rdiquis 5 fertilibus. AcA- 

 emum exalatum, quadrigonum, conforme. Pappus coroniformis, repandus. Cor. ?; 5 



