308 » COMPOSITJE. [Xmifhmm, 



CapL Sabine, Dr. Richardson, — The latter gentlemara observes that the flowei-s are fragrant, prohably 

 like those of Tussilago fragrans of our gardens, which etjually belongs to the present Genus. ■ ; 



4, N.palmata; foliis reniformi-cordatis profunde palmato-Iobatis laciniis angulatis den- 

 tatis subtus tomentosis. — Tussilago palmata. AiL HorL Kew. ed. 1. r. 3. p, 188. t 2. Pursh^ 

 FL Am. V. 2, p, 331. EicL in FrankL \st Journ. ed, 2, App. p. 33. 



Hab. From Lake Huron, (Nuttallj) to the Bear Lake, lat. 67°, north, {Dr. Richardson^ Drumnwnd:) 

 and from Labrador and Newfoundland on the East, (JDr. Fothergillt Kohhneister, 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 yery slight 

 characters, and the numerous specimens before me, wotdd, 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, rellquis $ . Cor. $ . . . 

 Pappus 0. — Herbse perenneSy Americancs^ glandulis pedicellatis adsperscB ; foliis subtus alho- 

 tomentosisy petiolatls; involucris uniserialibus demum reflexis ; capitulis paucifloris^ panicii- 

 latisy parvis. Less. 



1. A. bicolor ; elatum, foliis cordato-ovatis subtrilobis angulato-dentatis. Hook, in Bot. 

 Misc. V. I. p. 19. t. 15. 



Hab. Dense woods at the Straits of Do Fuca, and about Fort Vancouver, on the Columbia. Woods 

 on the Portage River, one of the som-ces of the Columbia, in the Rocky Mountains, lat. 52° north. Drum- 

 mond. — 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 Ptippig. 



Trib. IV. Senecionide^. Less. 



Subtrib. I. Ambrosie^. Capitula aut monoica ant heterogama^ floribus in centro mas- 

 culis. Rachis in capitulis heterogamis bracteolata, bracteolis glabris. Antperw ecaudatcE. 

 Less. 



(A. Ambrosie.e verse. Cor. floris $ fiUformi ; acheniis calvis, erostribus, involucro swpe 

 inclvsis; stylo floris masculi clavato^ truncato^ apiceque solo penicillato. Less.) 



24. XANTHIUM. Linn. 



Capitiiia homogama, monoica; foeminea biflora, involucro hamato-spinoso cincta. Achenia 

 compressa, singula in loculis singulis involucri demum indurati et bilocularis nidulant. 



Herbse Americts vel Europm indigenes^ smpe spinosmi foliis alternis, asperis, varie incisis; 

 capitulis irregulariter glomerato-spicatis ; spica terminali, superne mascula^ bast foeminea. 



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. B. p. 852.— X. maculatuui. Eaf. in Sill. Journ. (Torrey, 

 in litt.) 



Hah. Canada? North-West coast of America. Douglas. 



