Artemisia. COMPOSITE. 403 



5-toothed. 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, 

 si imetimes 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 Atlantic States ; hut abounding through the 

 interior arid region, where the Sage-bushes form a characteristic feature. Our species are all per- 

 ennials, ./. 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 ; 

 Dreen and nearly glabrous : leaves linear, entire, 6. A. DRACTJNCOT.OIDKS. 



i!iven, becoming glabrous : leaves twice pinnately parted, 2. A. NoBVEQICA. 



White-cottony underneath the leaves ; upper face green. 



Lobes of the leaves lanceolate, acute, 3. A. VULGARIS. 



Lobes of the leaves narrowly linear, 4. A. DISCOLOR. 



White-cottony throughout, 5. A. Ludoviciana. 



Silky villous all over, 7. A. PYCNOCEPHALA. 



Shrubby and spiny : heads few and scattered, 8. A. spixescens. 



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

 Grayish-puberulent : pinnate leaves with long filiform divisions, 1. A. Califop.xica. 



White-pulieseent t leaves pahnately cleft or toothed, sometimes entire. 



One to 6 feet high : leaves about 3-toothed, 9. A. tridextata. 



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



Their 3 lobes linear, 10. A. trifida. 



Their 3 to 5 lobes obovate or spatulate, 11. A. arbuscela. 



§ 1. Flowers heterogamous (some of (he marginal ones pistillate only), but all fertile : 



receptacle not villous. — Abrotanum, Besser. 



* Shrubby: lobes of the cinereous-puberulent leaves filiform-linear. 



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

 very leafy : leaves all pinnately ."> - 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 somewhal turbinate and 

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

 Fisrliirianii, I'.csser. A. filiosa AV .1. 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. 



H,rh,ie,,,iis : I., ires or their /■<!„.•: linear-lanceolate ">• broader. 

 +- Xi,t white-cottony: corolla sparsely hairy. 



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

 when young, or glabrous: leaves mostly hipinnately patted or cleft into linear- 

 lanceolate or broader acute lobes, or tin- uppermost reduced to tritid or simple 

 bracts: leads large, in a simple naked panic] loose raceme: scales of the invo- 

 lucre oblong, brownish : akenes oblong, aboul 5-angled. — Nbvit. Suec. ed. 1 (1817), 

 "Hi. A. rupistris. Fl. Ihm. t. sol. J. a Mica, Less. (1831). A. Chamissoniana, 

 Besser. in Hook. Fl. 



North side of \V l' s Peak in the Sierra Neva. la, at 9,000 feet, Abo in the Rocky and 



other high mountains to Alaska, Arctic America, K. Siberia, and the Norwegian Alp-. ! 

 globular, about 1 lines in diameter. 



-t- -t- Leaves white-cottony-tomentose underneath or on both sides: corolla glabrous. 



3. A. vulgaris, Linn. A fool or two high; branching: leaves green and gla- 

 brous or soon becoming so above, cottony-tomontose beneath, lacinintely once or 

 twice pi it ifid, or some of the upper sparingly lobed or toothed ; the lobes lat 



