890 



COMPOSITAE 



6A. Leaves densely woolly beneath. 

 7A. Leaves silvery-woolly beneath. 



8A. Leaves truncate at base; heads 4-5 cm. across 6. C. ornatum 



8B. Leaves broadly cuneate at base; heads narrower. 



9A. Leaves with shallow pinnate lobes in those of upper part; near seashores. 



lOA. Involucres about 10 mm. across, the outer bracts linear 7. C. shiwogi\u 



lOB. Involucres about 6 mm. across, the outer bracts ovate 8. C. pacificum 



9B. Leaves deeply pinnately cleft into narrow lobes; involucres 3-4 mm. across; alpine 9. C. rupestre 



7B. Leaves grayish white-woolly beneath. 



IIA. Leaves usually cuneate at base; involucral bracts nearly equal. 



12A. Leaves obovate or oblanceolate, shallowly pinnatilobed, grayish woolly on upper side 10. C. yoshinaganthum 



12B. Leaves ovate or broadly so, 3-cleft, green on upper side 11. C. makinoi 



IIB. Leaves slightly cordate at base; outer involucral bracts shorter than the inner ones 12. C. japonense 



6B. Leaves slightly pubescent beneath. 



13A. Leaves pinnately cleft, cuneate at base; involucres 13 mm. across, the outer bracts linear 13. C. cuneifolium 



13B. Leaves rarely deeply cleft, truncate to cordate at base. 



14A. Heads solitary on the branchlets, 3-7 cm. across; outer involucral bracts linear 14. C. zawadskii 



14B. Heads many, in corymbs. 



15A. Heads 12-20 mm. across, in false umbels. 



16A. Involucres about 5 mm. long, the outer bracts linear; stems erect from the base 15. C. boreale 



16B. Involucres 6.5 mm. long, the outer bracts oblong or ovate; stems decumbent 16. C. offense 



15B. Heads often more than 25 mm. across, in corymbs. 



17A. Heads about 2.5 cm. across; outer involucral bracts ovate or oblong 17. C. indicum 



17B. Heads 3-4.5 cm. across; outer involucral bracts oblong or linear 18. C. aphrodite 



1. Chrysanthemum vulgare (L.) Bernh. Tanacetum like appendages at base; heads solitary on branches, long- 

 vulgare var. boreale (Fisch.) Makino ex Makino & Nemoto; pedunculate, erect; outer involucral bracts linear, 1-1.8 mm. 

 T. boreale Fisch. ex DC; T. vulgare var. boreale (Fisch.) wide, rounded at apex, the median as long as the outer, oblong, 



Trautv. & Mey.; T. vulgare sensu auct. Japon., non L. Ezo- about 3 mm. wide, with brown scarious margins, slightly 



YOMoGiGiKU. Rhizomes long-creeping; stems 60-70 cm. reddish on upper half, die inner bracts slightly shorter; ligu- 



long, slightly cobwebby-pubescent, branched in upper part; late florets 1-seriate, the corollas white, about 2 cm. long, 4-6 



median cauline leaves oblong, 15-25 cm. long, 7-11 cm. wide, mm. wide; achenes about 2 mm. long. Sept.-Dec. Rocks 



often clasping at base, slighdy cobwebby-pubescent, bipinnate, near seashores; Hokkaido, Honshu (n. Kanto Distr. and 



the pinnae about 12-pairs, approximate, lanceolate, 12-20 mm. northw.). 



wide, acuminate, the pinnules 2-3 mm. wide, acute, callose- Chrysanthemum X miyatojimense Kitam. Miyato- 



toothed, glandular-spotted on upper side, the upper leaves jimagiku. Hybrid of C. morifolmm X C. yezoense. 



gradually smaller and less divided; heads in dense corymbs, Honshu (Rikuzen Prov.). 



short-pedicelled, about 1 cm. across; involucres depressed-glo- 4. Chrysanthemum weyrichii (Maxim.) Miyabe. Leu- 



bose, 4 mm. long; bracts 4-seriate, the outer ovate-oblong, ob- canthemum weyrichii Maxim.; C. littorale Maekawa; C. wey- 



tuse, shorter than the median; ligulate florets 1-seriate, the richii var. littorale (Maekawa) Kudo Pireo-giku, Ezo-no- 



tubular corollas about 2.5 mm. long, yellow; achenes about 2 sonaregiku. Plant stoloniferous; stems 10-30 cm. long, 



mm. long, with a very short crownlike pappus. July-Sept. simple or branched, purple, soft-pubescent; radical and lower 



Hokkaido. Korea, Manchuria, Sakhalin, and e. Siberia. cauline leaves long-petiolate, fleshy, suborbicular, palmately 



2. Chrysanthemum nipponicum (Franch.) Matsum. 5-cleft or parted, the segments oblong, pinnately lobed to 



Leucanthemum nipponicum Franch. ex Maxim. Hama- parted, slighdy pubescent or nearly glabrous, the upper leaves 



GiKU. Stems to 1 m. long, branched, puberulent in upper smaller, pinnately cleft or linear and undivided; heads solitary, 



part; cauline leaves approximate, spathulate, 2-9 cm. long, 4-4.5 cm. across, long-pedunculate; outer and median involu- 



1.3-2 cm. wide, obtuse, obtusely undulate-toothed, gradually cral bracts equal in length, the outer linear, about 1 mm. wide, 



narrowed and entire at base, fleshy, puberulent, lustrous, 1- die median oblong, about 3 mm. wide, the inner somewhat 



nerved, sessile, the upper leaves gradually smaller, narrowly shorter; ligulate florets 1-seriate, die corollas pink or white, 



oblong; heads long-pedicelled, solitary, about 6 cm. across; 15-16 mm. long, 4-4.5 mm. wide; achenes about 2 mm. long. 



involucres about 1 cm. long; bracts 4-seriate, puberulent, Aug.-Oct. Rocks near seashores; Hokkaido. Sakhalin. 



brownish on margin, the outer ovate-oblong, obtuse, the inner 5. Chrysanthemum lineare Matsum. Mikoshi-giku, 



narrowly oblong; receptacle glabrous; ligulate corollas white, Hosoba-no-seitakagiku. Plants stoloniferous; stems 30- 



22-28 mm. long, 5-6 mm. wide; achenes 3-4 mm. long. 100 cm. long, often branched, puberulent; lower leaves 4.5-9 



Near seashores; Honshu (Kanto Distr. and northw.). cm. long, often withering before anthesis, sessile, subentire to 



3. Chrysanthemum yezoense Maekawa. C. arcticum 3-lobed or -cleft, or rarely pinnately cleft, the lobes 1 or 2 

 sensu auct. Japon., non L.; C. arcticum subsp. mae\awanuin pairs, erect, linear, often incised to the base; heads solitary, 

 Kitam.- — — Ko-hamagiku. Plant stoloniferous and with 3-6 cm. across; involucres 5-6 mm. long, slightly woolly; bracts 

 long-creeping rhizomes; stems 10-50 cm. long, purplish, equal in length, the outer narrowly linear, rounded at apex, 

 slighdy pubescent; radical and lower cauline leaves long-petio- the inner oblong, with broad scarious margins; ligulate florets 

 late, ovate-cuneate or broadly so, 1-4 cm. long and as wide, 1-seriate, sterile, the corollas white, about 2 cm. long, 5 mm. 



pinnately cleft or lobed, the lobes oblong, obtusely toothed on wide; achenes with 10 prominent ribs. Sept.-Nov. Wet 



upper margin, fleshy and nearly glabrous, glandular-punctate, places in mountains; Honshu, Kyushu. Korea and Man- 



the upper leaves spathulate, sometimes with a pair of stipule- churia. 



