894 



COMPOSITAE 



23A. Leaves simple, oblong-lanceolate, acuminate at both ends, acutely toothed 20. A. monophylla 



23B. Leaves once to twice pinnately parted to cleft. 



24A. Leaves once to twice pinnately parted; involucral bracts equal in length 21. A. unalas\ensis 



24B. Leaves pinnately cleft; outer involucral bracts shorter. 

 25A. Heads 3-6 mm. wide. 



26A. Heads 3-4 mm. wide, 4-4.5 mm. long, cobwebby; leaves cobwebby above, gray-woolly beneath. 



22. A. stolonijera 

 26B. Heads 4-6 mm. wide, about 5 mm. long, villous; leaves villous, the upper ones gray-cobwebby. 



23. A. \oidzumii 

 25B. Heads 1.5-2.5 mm. wide. 



27A. Upper leaves and heads densely cobwebby; heads 1.5-2 mm. wide 24. A. momiyamae 



27B. Upper leaves and heads not densely cobwebby. 



28A. Leaves bipinnate, the segments narrow, 5—7 mm. wide, acuminate; heads 2-2.5 mm. long, 1.5 mm. 



wide 25. A. rubripes 



28B. Leaves pinnately parted to divided. 



29A. Stems 1.5-2 m. long; leaves 15-19 cm. long; heads 3.5 mm. long, about 3 mm. wide. 



26. A. montana 

 29B. Stems 0.5-1 m. long; leaves 5-10 cm. long. 



30A. Heads 2.5-3.5 mm. long, about 1.5 mm. wide 27. A. princeps 



30B. Heads 3.5-4 mm. long, about 2.5-3 mm. wide 2i. A. indica 



5B. Receptacles densely hairy. 



31 A. Stems branched; heads about 5 mm. across, in panicles 29. A. schmidtiana 



31B. Stems simple; heads about 8 mm. across, in simple racemes 30. A. kjtadal{ensis 



1. Artemisia congesta Kitam. Oni-otoko-yomogi. 

 Rhizomes long-creeping, 4-7 mm. across; flowering stems 40- 

 65 cm. long, branched above, gray-woolly while young; sterile 

 shoots elongate, decumbent, with a tuft of rosulate leaves at 

 apex; basal leaves rather thick, long-petiolate, densely gray- 

 woolly while young, ovate or broadly so in outline, 5.5-8 cm. 

 long, 6-7 cm. wide, pinnately parted, the segments oblong- 

 cuneate, pinnately cleft or incised, the cauline leaves petiolate, 

 5-7 cm. long, 1-2 mm. wide, bipinnate, gray-woolly to gla- 

 brescent, the upper leaves short-petiolate, smaller, pinnate, the 

 uppermost leaves becoming bracteate, linear, entire; heads 

 many, in a spikelike panicle; involucres globose, 3.5 mm. long, 

 4 mm. wide; bracts 4-seriate, the outer smallest, ovate, obtuse, 

 the inner elliptic; achenes 1.3 mm. long. Sept. Near sea- 

 shores; Hokkaido (Kojima in Oshima Prov.), Honshu (Ben- 

 tenjima in Mutsu). 



2. Artemisia scoparia Waldst. & Kitaib. A. capillaris 

 van scoparia (Waldst. & Kitaib.) Pampan. Hama-yomogi. 

 Roots fusiform, branched; flowering stems 60-90 cm. long, 

 much branched above, sometimes with purplish sterile shoots 

 at base provided with a tuft of rosulate leaves at the apex; 

 cauline leaves 3-5 cm. long, 2-5 cm. wide, once to twice pin- 

 nate, broadly clasping at base, the segments filiform, elongate, 

 the upper leaves gradually smaller; heads very many, small, 

 1.2-1.5 mm. long, 1-1.2 mm. wide, in large panicles, the pedi- 

 cels short; involucres globose, glabrous; bracts 3-seriate, the 

 outer shortest, broadly ovate or elliptic, obtuse, the median 



and inner elliptic. Sept.-Nov. Waste grounds; Honshu. 



Korea, Manchuria, n. India, China, Siberia, and Europe. 



3. Artemisia capillaris Thunb. A. capillaris var. arbu- 



scula Miq. Kawaka-yomogi. Subshrub; stems somewhat 



woody, 30-100 cm. long, much branched, silky-pubescent while 

 young; sterile shoots with a tuft of rosulate leaves at the tip; 

 upper leaves of the sterile shoots long-petiolate, broadly clasp- 

 ing at base, bipinnatisect, 1.5-3.8 cm. long, the ultimate seg- 

 ments fiiliform, 0.3-1 (-2) mm. wide, usually densely silky, the 

 median cauline leaves 1.5-9 cm. long, 1-7 cm. wide, broadly 

 clasping at base, bipinnatisect, glabrous to densely silky, the 

 upper leaves smaller, pinnatisect; heads very numerous, glo- 

 bose or ovoid, glabrous, 1.5-2 mm. long and as wide, in large 



panicles; involucral bracts 3- or 4-seriate; outer very small, 

 ovate, obtuse, the inner elliptic, rounded at apex, keeled on 



back; achenes 0.8 mm. long. Sept.-Oct. Along rivers and 



seashores; Honshu, Shikoku, Kyushu. ^Korea, Manchuria, 



China, Formosa, and Philippines. 



4. Artemisia japonica Thunb. Chrysanthemum japoni- 

 cum Thunb.; A. subintegra Kitam.; A. manshurica Komar. 



Otoko-yomogi. Herb; nonflowering stems elongate, 



with a tuft of leaves at the tip; leaves of the sterile shoots 

 spathulate, 3.5-8 cm. long, 1-3 cm. wide, rounded, pinnately 

 lobed and toothed, loosely silky-pubescent on both sides; flow- 

 ering stems 40-100 cm. long, branched above, rarely cobwebby; 

 median leaves rather fleshy, cuneate-spathulate, 4-8 cm. long, 

 toothed, 3-fid, pinnately parted, or pinnately divided, the brac- 

 teate leaves linear, small; heads small, many, ovoid-globose or 

 ellipsoidal, slightly lustrous, yellow-green, glabrous, in pani- 

 cles; outer involucral bracts small, ovate, obtuse, the inner ellip- 

 tic, rounded at apex; achenes 0.8 mm. long. Aug.-Nov. 



Sunny hills and low elevations in the mountains; Hokkaido, 



Honshu, Shikoku, Kyushu; common. Ryukyus, Formosa, 



Korea, Manchuria, China, and Philippines. 



Var. macrocephala Pampan. A. desertorum sensu auct. 

 Japon., non Spreng.; A. japonica var. desertorum sensu auct. 



Japon., non Maxim.; A. littoricola Kitam. Hama-otoko- 



YOMOGi. Heads larger, about 2 mm. wide; leaves pinnate or 



bipinnately cleft. Near seashores; Hokkaido, Honshu (Ugo 



Prov.). s. Kuriles and Sakhalin. 



5. Artemisia annua L. Kuso-ninjin. Annual; stems 

 to 1.5 m. long, glabrous, much branched; median cauline 

 leaves broadly clasping at base, ovate in outline, 4.5-7 cm. long, 

 tripinnate, the pinnae oblong, spreading, the ultimate segments 

 acute, about 0.4 mm. wide, mealy-puberulent above, glandular- 

 dotted, the rachis entire, the upper leaves smaller; heads glo- 

 bose, small, about 1.5 mm. long, very numerous; involucres 

 glabrous; bracts 2- or 3-seriate, the outer narrowly oblong, 

 green, the median and inner elliptic, green on back; achenes 



0.7 mm. long. Aug.-Oct. Waste grounds and cultivated 



fields; Honshu, Shikoku. Formosa, Korea, Manchuria, Si- 

 beria, China, India, w. Asia, and e. Europe; naturalized in w. 

 Europe and N. America. 



