Coreopsis COMPOSITAE Cosmos 



2-5 cm. in diam.; bracts of the involucre in 2 series, oblong to lanceolate, not 

 glandular; receptacle chaffy: rays yellow, brown, or sometimes rose-colored: fr. flat 

 or incurved, not beaked, sometimes winged; pappus of 2-4 awns (not retrorsely barbed), 

 scales or teeth, or none. 70 species, in America, tropical Africa and Hawaii; 2 

 cultivated in China. (Greek: koris, bug, and opsis, resemblance; referring to the 

 fruits.) 



Key to the Species 



Rays yellow, 2-3 cm. long: plant perennial 1 . C. lanceolata 



Rays reddish brown, at least at the base, 1-1.5 cm. long: plant annual . . 2. C. tinctoria 



1. Coreopsis lanceolata Linn. :£&$2(f (Ta Chin Chi Chii: Large-golden-chicken 

 Chrysanthemum) (B.M.1003). Erect perennial herb, to lm.; fls. yellow, V-VIII. 

 Introduced from eastern United States; locally in An., Ki., Ku. Cultivated, 

 ornamental, naturalized. 



2. Coreopsis tinctoria Nutt. &#$& (Po Ssu Chii; Persian Chrysanthemum) (B.M.1003). 

 Erect annual, to lm.; fls. yellow or brown, VI-VIII. Introduced from central 

 United States; locally in Ku. Cultivated, ornamental. Fig. 382. 



24. Dahlia Cav. ^fctfJM (T'ien Chu Mu Tan Shu; 

 Heavenly-bamboo Peony Genus) 



Stout erect tuberous- rooted perennial herbs with opposite pinnate lvs. : heads large, 

 10-12 cm. in diam.; bracts or the involucre in 2 series; receptacle chaffy: rays white, 

 red or purple: fr. oblong or obovate, flattened; pappus of 2 small teeth, or none. 15 

 species, in Central America; one cultivated in China. (Named after Andreas Dahl, a 

 Swedish botanist, died 1789.) 



1. Dahlia pinnata Cav. Garden Dahlia i<mVc (Ta Li Hua) (B.M.1000). Erect 

 perennial herbs, to 1.5 m.; fls. variously colored, X. Introduced from Central 

 America; locally in Ku. Cultivated, ornamental. Fig. 383. 



25. Bidens Linn. Bur Marigold HJf^S (Kuei Chen Ts'ao Shu) 



Erect brg. herbs with opposite pinnately incised or divided lvs. : heads in panicles, 

 with yellow or white rays; bracts of the involucre in 2 sets; the outer herbaceous; 

 the inner membranous; chaff of the receptacle deciduous with the fr. : fr. flattened 

 or 4-angled, not beaked, oblong or linear, crowned with 2-4 barbed awns. 90 species, 

 mostly American; 6 in China. (Latin: hi, two; and dens, teeth; referring to the 

 pappus awns.) 



1. Bidens pilosa Linn. MW (Kuei Chen Ts'ao; Devil's-needle Herb) (Be. F. 183). 

 Erect annual, to 0.8 m.; fls. yellow or nearly white, IX; fr. X. All warm 

 countries; locally in Ki., Ku. Roadside, woodland. Fig. 384. 



26. Cosmos Cav. Jk&MWM (Ta Po Ssu Chii Shu) 

 Tall branched herbs with mostly opposite lobed or pinnatifid lvs. : the large radiate 

 heads solitary or in loose panicles; bracts of the involucre in 2 series; receptacle 

 chaffy: rays showy, variously colored: fr. beaked at the top, and with 2-4 barbed or 

 hispid deciduous awns. 20 species, in tropical America; 2 cultivated in China. (Greek: 

 kosmos, ornament.) 



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