410 COMPOSITAE 
12. Artemisia absinthium L. Absinthe or Wormwood. Fig. 5704. 
Artemisia absinthium L. Sp. Pl. 848. 1753. 
ial herb sometimes slightly woody at base, 4-12 dm. tall; myer stems clustered, 
— ‘below striate, sericeous or glabrate. Lower leaves weak Bc tiolate ee e 3-8 cm. long, 
Vv 
profuse, leafy ; involucre hemisphe -3 mm. high, finely ana densely an s, the o phyl- 
laries linear, the inner broadly elliptic with broad scarious margins; ray- 5 9-20; disk-florets 
50, ferti Se Spe nearly cylindric, narrowed at the base, pies ie de recendacle thickly beset 
with long hai =, 9: 
Fields pe waste places, Arid Transition Zone; introduced in eastern Oregon and Washington eastward 
across the continent; native to Europe. July—Sept. 
13. Artemisia frigida Willd. Prairie Sagewort. Fig. 5705. 
Artemisia frigida Willd. Sp. Pl. 3: 1838. 1804. 
Absinthium frigidum Bess. Bull. Soc. Nat. Mose. 1: 251. 1829, 
erennial, mat-forming herb often woody at base and even somewhat shrubby, 1-4 dm. high, 
fragrant. Leaves small and numerous, crowded at the base and well distributed along the year 
sericeous-tomentose, twice or thrice ternately divided into linear or linear-filiform lobes 1 m 
or less wide, usually with a pair of trifid, stipule-like divisions at the base, petiolate or the sear 
ones subsessile, the blade 5-12 mm. long ; inflorescence paniculiform or much reduced and racemi- 
form on depauperate plants, the heads sessile ie shone epee’, nodding ; involucre h Sag ene 
2-3 mm. high, the phyllaries loosely tomen ray-florets 10-17; am Horets 25-50, fertile; 
achenes pS Saba glabrous ; peeptacte thickly” beset with long hai 
tik n places in plains and foothills, Arid Transition and Boreal as northeastern Washington to 
Ariz ne, Wisegnsin, Alaska, aaa Siboiay oes Fiabe i of the high plains. Type locality: Davuria, eastern 
Siberia. July—Sept. 
14. Artemisia dracinculus L. Dragon Sagewort or Tarragon. Fig. 5706. 
Artemisia dracunculus L. Sp. Pl. se — 
esha A annie Pall. Ps Willd. Sp. P 1804. 
neuloi Pursh, FI. Siok Sar. 742. 1814. 
Arecenieie precenentes var. glauca Bess. in Hook. Fl. Bor. Amer. 1: 326. 1833. 
a A. Nels. Bull. Torrey — 27: 73.1906; 
Artemisia ar guage ge typica — & Clem. maberee Inst, Wash. Publ. No. 326: 115. 1923. 
y u op. cit. 
Artemisia dracunculoides var. glauca soils, Man. S. Calif. re 1935. 
Perciibiad herb, 5-15 dm. tall, sponely ecor rous to nearly inodorous; stems several but not 
crowded, erect, simple to — mi cen Leaves linear to somewhat lanceolate, mostly 3-8 mm. 
lon mm e, gla s or Sea Licteally ville: oubertilest and glabrate, entire or a few of 
them saat inflorescence ne m, leafy-bracted and pss ascending brake the heads gen- 
erally no re hemisphe sok, 2-3 mm. high, 2-4 mm. wide; ray-florets 6-30 ; disk-florets 
ees the oistil esate acbeae glabrous, tps of the disk-£ florets abortive ; receptacle glabrous 
s 
ne 
et 
Open places, plains to moderate elevations in the mountains, Arid Tra on Zone; eastern isabel 
south to Lower California, to Texas, Illinois, Yukon, and Eerania. Type a Siberia. July—Oct 
15. Artemisia campéstris subsp. pee (Nutt.) Hall & Clem. Pacific Sagewort. 
Pe 
} . douglasiana Bess. in Hook. Fl. Bor. Amer. 1: 325. 1833. 
rtemisia desertorum var. scouferiana Bess. in Hook. loc. cit. 
Artemisia pacifica Nutt. Trans. Amer. Phil. Soc. II. 7: 410. 1841. 
Artemisia scouleriana Rydb. Bull. Torrey Club 33: 157, 1906. 
rtemisia camporum Rydb. N. Amer. tye 34: 254. 
Artemisia campestris var. pacifica M. E. Peck, Man. PI. Oreanet 768. 1941 
rtemisia campestris var. scouleriana ~ eaeing 7 sales s West. Bot. 7: 20. 1953. 
Perennial herb, 3-10 dm. high, with somewhat oe hi acing ce e; stems several to numerous, 
ti very leafy below, somewhat leafy to ie inflore: es bipinnately divided into nar- 
w linear iecenn about 1 mm. wide, edgpaion or ie ak “glabrate, 4-12 cm. long including 
the sah reduced upward; infloresc gs culiform, usually with numerous closely a oa 
branches, the ye horizontal or erect, n Pon nly w en se al ; involucre hemispheric, 2-3 
ei about 2. m. wide, the sieflatics es greenish and glabrous or sparingly tomentulose; a 
florets 8-20; disk- florets — the pistil sterile; achenes glabrous, tioae of the disk- florets 
sco — cle glabro 
ces, usually in sandy soil, Canadian and Transition Zon d Washington to Yukon, 
hia Rive Nebraska ene Mexico, Type 1 peels y: “shores of the Pacific ° ake yen! of the Oregon [Colum- 
rtemisia campestris subsp. borealis (Pall.) Hall & Clem. Carnegie Inst. Wash. Publ. No. 326: 122. 
1923." (Artemisia phased Pall. Reise 3: 755. 1776; A. spithamea Pursh, Fl. Amer. Sept. 522. 1814; A. bore- 
is var. purshii Bess r. Amer. 1: 326. art) A. borealis var. wormskioldit Bess, in Hook. 
= cit. 327: rd hongalte var. besseri Torr. & Gray, Fl. N. Amer. 2: 417. 1843; A. borealis var. spithamea 
