370 C0MP0SITJ5. Artemisia. 



143. A. virgatn, Richards, in Frankl. Journ. — Plains and mountains, Saskatchewan to Min- 

 nesota and W. Texas, west to Idaho, Nevada, New Mexico, &c. (N. Asia.) 

 A . ABsfxTiiiuM, L. (Wormwood.) Frutescent, paniculately branched, 2 or 3 feet high, 

 bearing numerous small heads in leafy panicles : leaves 2-3-pinuately parted into lanceolate 

 or oblong obtuse and entire or sparingly incised lobes : involucre canescent, of one or two 

 loose and narrow herbaceous bracts and several rouudisli and scarious : corollas glabrous. — 

 Spec. ii. 848 ; Engl. Bot. t. 1230. Absinthium vulgare, Lam. Fl. Fr. ; Goartn. Fr. t. 164. — 

 Roadsides, escaped from gardens, Newfoimdland to New England. Also Moose Factory, 

 Hudson's Bay. (Nat. from Eu.) 



* * Akenes broad or broadish and truncate at summit, commonly bearing a minute or even a 

 conspicuous squaniellate or coroniform-dentate pappus, therefore having the character of Tana- 

 cetuni, but the heads paniculate: receptacle glabrous or barcl}- pubescent. (Here belongs 

 A. Austrdlis, Less., of Hawaian Islands, as well as the anomalous A. CIdnensis, L.) — Croiso- 

 sU-phium, Less. Artemisia § Tanaceum^ Nutt. 



A . Calif ornica, Less. Shrubby, with habit of A. Ahrotanum, 4 or 5 feet high, ])aniculately 

 branched, minutely canescent or cinereous : leaves 1-2-pinnately parted into few filiform loljes 

 not wider than the rhachis, or uppermost entire : heads very numerous in leafy panicles : 

 involucre hemispherical, many-flowered, about 2 lines broad : akenes 3-5-ribbed, with a 

 minute squamellate crown at the broad summit. — Linn. vi. 523; Hook. & Arn. Bot. Beech. 

 150; Torr. & Gray, Fl. ii. 424 ; Gray, Bot. Calif, i. 403. A. Fischeriana, Besser, Abrot. 21 ; 

 DC. Prodr. vi. 105. A. abrotanoides, Fisc/tcriana, & foliosa, Nutt. Trans. Am. Phil. Soc. vii. 

 397, 399. California, along tlie coast, from San Francisco Bay southward and to San Ber- 

 nardino Co. ; fir,st coll. by Moizies. 



* * * Akenes obovoid or oblong, with small epigynous disk, wholly destitute of pappus: recep- 

 tacle not villous. — § Abrotanum, Bess. 



A. Abkotanum, L. (Southernwood), cultivated in old gardens, has become spontaneous in 

 a few places from New York southward. 



A. PROCERA, Willd., a less shrubby and finer-leaved species, has escaped from gardens at 

 Buffalo, New York. 



-1— Annuals and biennials. 



A. Annua, L. A tall and much branched glabrous species, native to Asia, with a very ample 

 and loose panicle of small heads, and leaves 2-pinnately divided into oblong deeply pinnatifid 

 segments. — Naturalized in waste places around Nashville, Tennessee. 



A. biennis, Willd. Wholly glabrous, inodorous and nearly insipid: stem strict, 1 to 3 

 feet liigh, leafy to the top, bearing close glomerules of small heads in the axils from toward 

 the base of the stem to the somewhat naked and spiciform summit: leaves 1-2-pinnately 

 parted into lanceolate or broadly linear laciniate or incisely toothed lobes ; or the u])permost 

 small, sparingly pinnatifid and less toothed. — Phytogr. 1794, 11, & Spec. iii. 1842 (excl. 

 hab. New Zeal.) ; Pursh, Fl. ii. 522 ; Nutt. Gen. ii. 144 ; Bess, in Hook. Fl. ; DC. Prodr. vi. 

 120; Torr. & Gray, 1. c. A. Hispanica, Jacq. Ic. Rar. i. t. 172, not Lam. — Open grounds, 

 Hudson's Bay to Oregon and Colorado; also in Utah and S. California: common also from 

 Ohio and Tennessee to Missouri, probably by immigration, now spreading to the seaboard. 

 ( Kamtschatka, N. India.) 



H— -i— Perennials, some fruticulo.se. 



++ Heads many-flowered, collected in a single capitate glomerule or dense cluster: dwarf, arctic, 

 with leaves mainly in radical tufts. (Nearly related species.) 



A. Senjavinensis, Bess. Cespitose-proliferous, very densely villous with long hairs, 

 which on the radical tufts conceal the foliage : leaves much crowded in the tufts, and scat- 

 tered on the flowering stems, cuneate or oblong, simply 3-5-cleft into oblong or lanceolate 

 lobes : heads in a dense villous glomerule, fuscous : involucral bi'acts sphacelate : corolla 

 glabrous. — Abrot. 65 (as Semavincnsis), Suppl. in Bull. Mosc. ix. 64, & DC. Prodr. vi. 116. 

 A. androsacen (characteristic name). Seem. Bot. Herald. 34, t. 6 (founded on A. ijlomerata, 

 Hook. & Am. Bot. Beech. 125, not Ledeb.); Hook. f. Arct. PI. 331. — Kotzebue Sound, 

 Beecheij. (Adj. Asia, Arakamtchetchene Island, Wright.) 



A. glomerata, Ledeb. Silky-canescent with mostly close short pubescence : leaves usually 

 twice or thrice ternately parted and cleft into lanceolate or spatulate lobes : heads cymose- 

 glomerate, fuscous or pale : flowers sparsely pilose, at least the summit of the corolla. — 



