Artemisia. COIIPOSIT-E. 369 



Am. Phil. Soc. vii. 399 ; Torr. & Gray, Fl. ii. 419. — Arid grounds in the Pocky Mountains 

 of Wyoming, Montana, and Idaho, Xuttall, Frrmont (without flowers), Parry] Haa been 

 wrongly referred to the following section of the genus. 

 A. pycnocephala, DC. A foot or two high, cither herbaceous or with a woody base, 

 densely silky-villous, even to the involucre, robust : lea\ e.s 1-3-pinnately parted into rather 

 few and short linear or spatulate lobes: heads numer.ju.s (2 lines broad), glomerate in an 

 elongated and interrupted .^piciform leafy thyrsus. — Gray, Bot. Calif, i. 404. A. pycno- 

 cephala & A. paclii/stachi/a, IJC. L c. 99 & U4; Torr. & Gray, 1. c. A. pycnostacJiya, Xutt. 

 1. c, error iu name. Olnjosjiorus pycmcephalus, Le.^:^. in Linn. vi. 524. — .Sea-.~liures, Cali- 

 fornia, from Mi.iiterey to Humboldt Co. ; first coll. by Chamisso. 



++ ++ Leaves mt.sily entire, occasionally some 3-cleft, or the lowest even more divided: base of 

 stems rather lignescent. 



A. glaiica, Pall. ^Minutely silky-pubescent or canescent, sometimes glabrate and glaucous : 

 stems strict, a foot or two high : leave-; rather sliort, from linear- to oblong-lanceolate : heads 

 nearly of the next, into which it probably pa-s^es. — Willd. Spec. iii. 1331; Iies.s. Dracunc. 

 55, & DC. 1. c. A. r/lauca, v&T.fustiijiata, Bess. 1. c. A. dracunculoides, var. incana, Torr. &, 

 Gray, Fl. ii. 416. — Saskatchewan and Minnesota, Drummond, XiroUft, Kfrmicott. 

 kA. draciinculoides, PcRSn. Glabrous, wantiug the scent and taste of J.. Drnr,inculus, 

 which it much resembles : stems 2 to 4 feet high, either virgately or panictilately branched : 

 leaves narrowly or sometimes more broadly linear : heads very numerous in a conjpound 

 and crowded or open and diffuse panicle. — Pursh, Fl. ii. 742: Torr. & Gray, Fl. ii. 416. 

 A. iJrariinculus, Pursh, Fl. ii. 521. A. cernua, 'Salt. Gen. ii. 143. A. inodora, Hook. & Am. 

 Bot. Beech. 150. A. XuttaUiana, Bess, in Hook. Fl., &c., shorter-leaved form, with lower 

 leaves more freely 3-cleft. — Plains, ^Missouri to Saskatchewan and Brit. Columbia, and from 

 Texas to Arizona and California. Polymorphous. 



A. Lewisii, Torr. & Gray, FL ii. 417, appears to be a fictitious species. The plant referred 

 to A. Sajitonica by l^ursh is wholly obscure. The specimen in herb. Michaux, with no indication 

 of source, which Bes^er made a var. Antfi/icana of A. variabilis, Tenore, is without much doubt 

 European. The plant of Engelmann, referred to by Besser in Linnsea, xv. Ill, is an imperfect 

 specimen, probabh' of A . Canadensis. 



T— -i— -!— SLifiriiti<_'i-e : heads very small and numerous, few-flowered. 

 . A. fllifolia, Torr. Minutely canescent, even to the 3-6-flowered involucre, 1 to 3 feet high, 

 with virgate rigid branches, very leafy : leaves all slender filiform, commonly 3-parted ; the 

 upper and those in axillary fascicles entire : heads crowded in an elongated leafy panicle : 

 receptacle small, not pilose. — Ann. Lye. X. Y. ii. 211 ; Torr. & Gray, Fl. ii. 417 ; Torr. in 

 Marcv Rep. t. 12. .1. Plattensis, Xutt. Trans. Am. Phil. Si.,e. vii. 397. — Plains, Nebraska 

 to New Mexico and western borders of Texas ; first coU. by James. 



§ 2. EcAETEMisiA. Heads heterogamous ; the disk-flowers hermaphrodite and 

 fertile, vrith 2-cleft stvle. — § Ahrotanum &z Ahsiatlniim. Bess. 



* Akenes obovoid or oblong, wholly destitute of pappus : receptacle beset with long woolly hairs. 

 — § Absinthium, Cess. 

 A. SCOpulorum, Grat. Herbaceous, a span or two high from a stout multicipital caudex, 

 silky-canescent : stems simple, bearing 3 to 12 spicately or racemoscly disposed hemispher- 

 ical (rarely solitary) heads: radical and few lower cauline leaves pinnately 5-7 -divided, and 

 divisions 3-parted into spatulate-linear lobes; uppermost simply 3-5-parted or entire: invo- 

 lucre 2 lines broad, villous, 1 S-30-flowered ; its bracts brown-margined: corollas hirsute at 

 summit. — Proc. Acad. PhUad. 1S63, 66 ; Eaton, Bot. King Exp. 184. — Alpine region of the 

 Pocky :iIountains in Colorado, Utah, and Wyoming: first coll. by Parry, Hall & Harbour. 

 Var. monocephala. Gray, 1. c, is merely a form with single head. 

 ■ A frigida Willd. Herbaceous from a suffrutescent base, silky-canescent and silvery, 

 about a foot high : stems simple or branching, bearing numerous racemosely disposed lje:v!s 

 in an open panicle : leaves mainly twice ternately or qninately divided or parted into linear 

 crowded lobes, and usually a pair of simple or 3-parted stipuliform divisions at base of the 

 petiole : heads globular, barely 2 hues in diameter : involucre pale, canescent, its outer bracts 

 narrow and herbaceous : coroUas glabrous. — Spec. iii. 1838 (Gmel. Fl. Sibir. t. 63) ; Pursh. 

 Fl ii a'^l ■ Ledeb. Ic. FL Alt. t. 462; Bess, in Hook. Fl. i. 321. A. sericea, Xutt. Gen. ii. 



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