COMPOSITAE 893 



oblong, pinnately cleft, green and pubescent above, rather above, white-pubescent beneath, pinnately cleft, the lobes of 2 



densely pubescent with dorsifixed hairs. Shikoku (lyo pairs, oblong, rounded, mucronate-toothed; heads 3-4 cm. 



Prov.). across, in terminal corymbs; involucres 8 mm. long; bracts 



Chrysanthemum X ogawae Kitam. Hi-no-misakigiku. 3-seriate, the outer linear or oblong, rounded, the inner ovate; 



Hybrid of C. indicum X C. s/i!ivogi/(_ii var. l{inol{^tinicnsc. ligulate florets 14-24, the corollas 17-23 mm. long, 3-4 mm. 



18. Chrysanthemum aphrodite Kitam. S.^ningiku. wide, yellow or white, sometimes rose-colored; achenes about 



Stoloniferous; stems about I m. long, woody at base, glabrous, 2 mm. long. Nov .-Dec. Honshu (Japan Sea side from 



decumbent, the branches white-pubescent; median and upper Etchu Prov. westw.). 



cauline leaves thin, broadly ovate, 5-7 cm. long, 4.5-5.5 cm. Chrysanthemum X shimotomai Makino. Nijig.^hama- 



wide, cordate and long-decurrent at base, scabrous and green giku. Hybrid of C. aphrodite X C. pacificum. 



42. ARTEMISIA L. Yomogi Zoku 



Entomophilous herbs or subshrubs, aromatic or bitter to taste, often silky or cobwebby; leaves alternate, entire, incised, or 

 1 to 3 times pinnate; heads small, usually nodding at anthesis, erect in fruit, in racemes, panicles, or sohtary, heterogamous; disc 

 florets without ligulate florets; involucres subglobose to ovoid; bracts few-seriate, imbricate, the outer small or nearly as long as 

 the inner, scarious on margin; receptacle flat or globose, often hairy; marginal florets pistillate, 1-seriate, fertile, the central ones 

 bisexual, fertile or sterile, the heads sometimes without marginal florets and hence homogamous; pisdllate corollas widi slender 

 tubes, shordy 2- or 3-lobed, the central florets with 5-lobed actinomorphic corollas; anthers with lanceolate appendages; achenes 



obovoid, terete, or usually with 2 obsolete wings, glabrous or hairy, rounded and with a disc at apex, without a pappus. About 



200 species, in the N. Hemisphere. 



lA. Central florets sterile. 



2.\. Heads 4 mm. wide; cauline leaves not clasping at base; sterile shoots elongate, decumbent; radical leaves gray-woolly, pinnately 



parted 1- '^^ congesla 



2B. Heads 1-3 mm. wide; cauline leaves clasping at base. 



3.\. Heads 1-1.2 mm. across; leaf-segments filiform 2. A. scoparia 



3B. Heads 1.5-3 mm. across; leaf-segments of some of them broader. 



4A. Subshrub; ultimate leaf-segments filiform 3. A. capillaris 



4B. Herb; ultimate leaf-segments broader, not filiform 4. A. japonica 



1 B. Central florets fertile. 

 5A. Receptacles glabrous. 

 6A. Annuals. 



7A. Ultimate leaf-segments acute; heads rounded at base. 



8A. Leaves thrice pinnate, the rachis entire; heads about 1.5 mm. across 5. A. annua 



8B. Leaves bipinnatc, the rachis pectinate; heads about 5-6 mm. wide 6. A. apiacea 



7B. Ultimate leaf-segments obtuse; heads obconical, about 4 mm. wide 7. A. jiiliudo 



6B. Perennials. 



9A. Style-branches acuminate; median cauline leaves obovate or spathulate, cuneate at base 8. /i. /^cis/icna 



9B. Style-branches truncate. 



lOA. Leaves usually rather densely silky-pubescent, rarely glabrous. 

 II A. Heads large, 8-14 mm. across. 



12A. Leaves spathulate, simple, incised-toothcd 12. //. pediinaiJosa 



12B. Leaves 1—3 times pinnate. 



13A. Cauline leaves 5-9 cm. long, 2-3 times pinnate. 



14A. Cauline leaves thrice pinnate, the ultimate segments about 1 mm. wide li. A. sinanensii 



14B. Cauline leaves bipinnatc, the ultimate segments 1.5-2 mm. wide \'\. A. arctica 



13B. Cauline leaves 1.5-2 cm. long, palmately 3- to 5-sected \Q. A. trifiircata 



IIB. Heads smaller, 4-6.5 mm. across. 



15\. Stems 7-16 cm. long; leaves palmately divided. 



16A. Heads in corjmbose racemes, 4.5 mm. long, about 6.5 mm. wide 10. /I. Irijiircata 



16B. Heads in dense corymbs, 4-4.5 mm. across 9. A. glomcrata 



15B. Stems 25-40 cm. long; leaves bipinnate or simple. 



1 ~.\. Leaves bipinnate 11.//. laciniata 



17B. Uaves simple 8. /•/. /("slicana 



lOB. Leaves cobwebby, often densely so beneath, rarely glabrous. 



18A. Heads 8-10 mm. wide; leaves pinnately cleft, densely cobwebby and grayish on both sides \5. A. stcUeriana 



183. Heads 1-6 mm. wide. 



I9A. Plants without stolons; ultimate leaf segments relatively small, 1.5-4.5 mm. wide 16. ./. twayomosi 



19B. Plants stoloniferous; ultimate leaf segments relatively large. 



20.\. Heads 2 mm. long, about 1 mm. across 17. A. jeddci 



20B. Heads more than 1 mm. across. 

 21 A. Leaves white-spotted above. 



22A. Median leaves bipinnate, the ultimate segments linear 18. A. dtibia 



22B. Median leaves 3-fid, the lateral lobes lanceolate to oblong \9. A. gilvescens 



2 IB. Leaves not white-spotted above. 



