404 COMPOSITAE 
Pee 
1 biennial, taprooted; 1 ially glabrous. 9. A. biennis. 
Sen gear 
Il shrub, 5-25 dm. high; leaves ternately to bipinnately divided into narrow linear lobes. 
10. A. californica. 
Low spreading shrub, 2—4 dm. high; leaves narrowly cuneate, ——- : 
11. A. bigelovii. 
Receptacl d with long hairs (Section Absint 
Divisione Sly leaves oblong or Hoon aie iia segments ——— 1.5-4 mm. ee: plants 
su 4-12 dm. tall. » A re 
Divisions fe =. linear, ultimate seg ts about 1 mm. wide; plants sual 1-4 dm. ‘ai 
A, frigida. 
Disk- i perfect but pistil infertile, the ovary os (Section Dracunculus), 
Plan Sesiien eet achenes essentially glabro 
ns ineuety entire, occasionally to 3- sane 14. A. dracunculus, 
ete finely divided int A — or linear-obl late lobes 
Pubescence wk t 1 silky, f 1 bescent or glabrate. 
Heads ‘relatively small, the ates usuaily 2-3 mm, tall ne, paniculiform, 
less condensed; ters to 10 dm. in height. 15. A. mpestris pacifica 
Heads posits ge involucre pues 3-4 mm. tall; Gy ercresnee pb often Soinifeen or 
nearly so; ges 1—4 dm. in height. fA. campestris borealis. 
tueawey loosely s villous, very dense over all parts of the plant yeh re 2 Ee coast 
f Cali sone and in so uthern Oregon. . A. pycnocephal: 
‘ A, spihersbeae 
Plants shrubby wid spinescent; 
Pistillate marginal ee eR. all florets perfect al fertile (Section Seriphidium). 
ecepta ubs. 
naked; plants woody shr 
a ones nc or Looe — 3-7 teeth at the apex, or sometimes linear, entire and truncate 
unded (a few lea of A. ockii may be entire and acute). 
Moke poten ro comtcieg ony pre to large, 3-12 —— per head; bbe mg ad ~~ or 
saukewerieg shoots, or if such leaves present — uncate or rounded; leaves deeply 
divided only o: montane forms of A. arbus 
Leaves mostly t thre or more times as long as eh 1.5-5 ¢ long, entire or 3—7-toothed at 
apex, lin aired cuneate or with divergent 5eke ‘lobes; habit variable. 
Achenes glandular. -granuliferous, r arely sparsely short-villous; ; cuneate, 3—5-dentate 
metimes linear aie entire Pith a rounded or truncate apa 
18. A. tridentata tridentata. 
Achenes arachnoid srerteritions, rarely less pubescent; ves ai with an obscurely 
notched, truncate or rounded apex, or with Giveteesn ‘obes at apex. 
7 ae ee a. 
Leaves mostly as long or three times Pig long as wide, 0 long (spri ‘Ss sometimes 
longer ger), broadly cuneate or flabelliform, 3—5- ace 6 — “lobed at apex; | sie spreading 
arb 
Plants often root-sprouting; heads large, 8-20 — per head; often with many leaves entire re 
acute, leaves on often peony | ie: x eee y parted; found at Se clevations | in the Sier 
Nevada and San Bernardino Mou . A, rothrockit 
naa Lae 7 or dbianbeola te, entire prey an acute or acuminate Tae} or leaves deeply divided 
030 e linear or li beapobtaneedlate lobes. 
be narrowly oblanceolate, jnoety. seve or ait a few irregular - or shes (some leaves may 
gth in some plants). » Asif 
Leaves ‘eauels divided into s or acess narrow lobes, entire linear leaves dai may he prone: 
At least the upper g their 
gh — 
Heads all exceeded by their subtending bracts; leaves deciduou “ A.r 
were _ — all or most of the florets subtended by bracts; plants ‘with sorubby ate ant long herba- 
A. pal 
1. Artemisia norvégica subsp. saxatilis (Bess.) Hall & Clem. Mountain 
Sagewort. Fig. 569 
Artemia arctica Less. Linnaea 6: 213. 1831. 
var. saxatilis Bess. in Hook. Fl. Bor. Amer. 1: 324. 1833. 
Artemisi r. pacifica A. Gray, Syn. Fl, N ry 12: 371. 1884, 
Artemisia sabicoke Rydb. Bull. Torrey Club 32: 128. 1905, 
Artemisia norvegica subsp. saxatilis Hall & Clem. Carnegie Inst. Wash. Pub. No. 326: 58. 1923. 
Artemisia norvegica var. saxatilis Jepson, Man. Fl. Pl. Calif. 1141. 19 25. 
Tufted perennial from a branching caudex, 1.5-6 dm . tall; plant loosely villous to essentia 
labrous. Basal leaves Souiteat, petiolate, the broad blade 2- 10 cm. lo ong, pinnately dis cr tata ed 
rrow and : i he ile ; 
narrowly rge; h 
moderately woolly-villous, 4-6 mm. high, the phyllaries dark-margined; ray-flor 12; disk- 
florets 30-80, fertile, the corolla Ao a at least near the base; achenes seach olinicic glabrous 
or granu iferous : recepta ae glabro 
Talus slopes, ack oute and o woods, Boreal Zone; Cascade and Olympic Mountains of Washington 
southward in the moutains oe ‘the ili Sierra Novel da, in the Rocky Mountains south to a north- 
ward through Canada and Alaska to eastern Siberia. Type locality: Rocky Mountains. July—Sep 
* Artemisia trifurcata Steph. ex Spreng. Three-forked Sagewort. Fig. 5694. 
rtemisia trifurcata nip ex Spreng. Syst. 3: 488. 1826. 
Artemis ribbons Nuov. Mem. Soc. Nat. Mosc. 3: 74. 1834. 
rtemisia tacomensis Fee ab. a Amer. FI. 34: 362. 1916. 
eee norvegica Pas heterophylla Hall & Clem. Carnegie Inst. Wash. Publ. No. 326:59. 1923. 
Artemisia trifurcata subsp. tacomensis Hultén, Fl. Alaska & Yukon 1577. 1950. 
