Artemisia. COMPOSTT.E. 



403 



5-tootbe(l. Anthers usually with narrow tips. Akenes obovoid or oblong, mostly 

 rounded at the apex and with a rather small terminal areola, almost always glabrous. 

 Pappus none, or in one species a vestige. — Herbs or undershrubs, bitter and 

 odorous ; with alternate leaves most commonly dissected, and the numerous small 

 heads of yellow or yellowish flowers usually nodding, and racemose or panicled, 

 sometimes paniculate-spicate. 



•An immense genus mainly of the northern hemisphere, its headquarters in Northern Asia ; not 

 many species in California, and fewer still in the Atlantii; States ; but abounding through the. 

 interior arid region, where the Sage-bushes form a characteristic feature. Our sjiei/ies are all i)er- 

 ennials, A. biennis, Willd., not having been found so far west. To facilitate the determination 

 of the species an artificial key is appended. 

 Herbaceous, or hardly woody at the base ; 



Green and nearly glaltrous : leaves linear, entire, 

 Green, becoming glabrous : leaves twice pinnately parted, 

 White-cottony underneath the leaves ; upper face green. 

 Lobes of the leaves lanceolate, acute. 

 Lobes of the leaves narrowly linear. 

 White-cottony throughout, 

 Silky villous all over. 

 Shrubby and spiny : heads few and scattered, 

 Shrubby, unarmed. (See also No. 7.) 



Grayish-puberulent : jiinuate leaves with long filiform divisions, 

 White-pubescent : leaves palmately cleft or toothed, sometimes entii'e. 

 One to 6 feet high : leaves about 3-toothed, 

 A span or two high : leaves deeply cleft or some entire : 

 Their 3 lobes linear. 

 Their 3 to 5 lobes obovate or spatulate, 



§ 1. Floiuers heterogamous [some of the marginal ones pistillate only), hut all fertile : 

 receptacle not villous. — Abrotanum, Besser. 



* Shruhhy : lobes of the cinereous-imherident leaves filiform-linear. 



1. A. Californica, Less. About 4 feet high, with a decidedly woody base, 

 very leafy : leaves all jtinnately 3 - 7-parted into almost filiform divisions, or some 

 of the uppermost entire : heads small and numerous in narrow racemose panicles : 

 scales of the involucre broad, nearly glabrous : akenes somewhat turbinate and 

 3-5-ribbed, utricidar, with a very broad and somewhat toothed summit. — A. 

 Fischeriana, Besser. A. foliosa & A. abrotanoides, Nutt. 



Dry banks, from below Santa Barbara to San Francisco. Heads roundish, about 2 lines in 

 diameter. Receptacle hemispherical, naked, not hairy, as said by Nuttall. 



* % Hei'baceous : leaves or their lobes linear-lanceolate or broader. 



■i- Not white-cottony : corolla sparsely hairy. 



2. A. Norvegica, Fries. A span to 2 feet high, stout, loosely villous-pubescent 

 when young, or glaltrous : leaves mostly bipinnately parted or cleft into linear- 

 lanceolate or broader acute lobes, or the uppermost reduced to trifid or simple 

 bracts: heads large, in a simple naked panicle or loose raceme : scales of the invo- 

 lucre oblong, brownish : akenes oblong, about 5-angled. — jS'ovit. Suec. ed. 1 (1817), 

 56. A. rupestris, Fl. Dan. t. 801. A. arctica, Less. (1831), A. Chamissoniami, 

 Besser. in Hook. Fl. 



North side of Wood's Peak in the Sierra Nevada, at 9,000 feet. Brewer. Also in the Rocky and 

 other high mountains to Alaska, Arctic America, E. Siberia, and the Norwegian Alps. Heads 

 globular, about 4 lines in diameter. 



-5- -t- Leaves u<Mte-cottony-tomentose underneath or on both sides : corolla glab7-ous. 



3. A. vulgaris, Linn. A foot or two high ; branching : leaves gi-eon ami gla- 

 brous or soon becoming so above, cottony-tomentose beneath, laciniatcly once or 

 twice pinnatitid, or some of the upper sparingly lobed or toothed ; tli-' lol.rs lanceo- 



