370 COMPOSITE. Artemisia. 



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

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

 ^A ■ ABsfxTHiuM, L. (Wormwood.) Frutescent, paniculately branched, 2 or 3 feet high, 

 bearing numerous small heads in leafy panicles : leaves 2-3-pinnately 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 roundish and scarious : corollas glabrous. — 

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

 Roadsides, escaped from gardens, Newfoundland 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 squamellate or coroniform-dentate pappus, therefore having the character of Tana- 

 cetum, but the heads paniculate: receptacle glabrous or barely pubescent. (Here belongs 

 A. Australis, Less., of Hawaian Islands, as well as the anomalous A. Chinends, L.) — Crosso- 

 stephinin, Less. Artemisia § Tamiceum, Nutt. 



"A. Calif ornica, Less. Shrubby, with habit of A. Abrotatmm, 4 or 5 feet high, paniculately 

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

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

 involucre hemispherical, many-fiowered, 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, Fischeriana, & foliosa, Nutt. Trans. Am. Phil. Soc. vii. 

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

 nardino Co.; first coll. by Hen-ics. 



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

 tacle not villous. — § Abrotimum, Bess. 



^■*A. Abeotanum, L. (Southeuxwood), cultivated in old gardens, has become spontaneous in 

 a few places from Kcw York southward. 



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

 Buffalo, New York. 



•i— 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 pinuatifid 

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

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

 feet high, 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: lca\es 1-2-pinnately 

 parted into lanceolate or broadly linear laciniate or iucisely toothed lobes ; or the uppermost 

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

 hab. New Zeal.) ; Pursh, Fl. ii. 522 ; Nutt. Gen. ii. 'l44 ; Bess, iu Hook. Fl. ; DC. Prodr. vi. 

 120; Torr. & Gray, I i.. A. Hispanica, Jacq. Ic. Ear. 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.) 



-I— -I— Perennials, some fruticulose. 

 ++ 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. Cesi.it(.se-proliterous, very densely villous with long hairs, 

 which on the ra.lical 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 bracts sphacelate : corolla 

 glabrous.— Abrot. 65 (as Seimwinmsis), Suppl. in Bull. Mosc. ix. 64, & 1)(\ Prodr. vi. 116. 

 A. androsacen (characteristic name). Seem. Bot. Herald. 34, t. 6 (founded on -1. qlomerata, 

 IL.ok. & Arn. Bot. Becli. 125, not Ledeb.); H.x.k. f. Arct. PI. 331. — Kotzebue Sound, 

 Lcrrliei/. (Adj. Asia, Ar.akaiutchetchene Ishmd, Wright.) 



A. glomerata, LkdivB. Silky-cauesccnt witli mostlv close short pubescence : leaves usually 

 twice or thrice ternately parted and cleft into lanee.ilate or spatulato lobes: heads cymose- 

 glomeratc, fuscous or pale: flowers sparsely pilose, at least the summit of the coriUa. - 



