168 SYNGENESIA, SUPERPLUA. 



calix is verv short, flat, and horizontally spreadinp^; the 

 leaflets of the paleaceous pappus awned, and the seeds 

 villous; the leaves are also alternate and entire. The 

 proximate aflinity of the present genus is to Tagetes. 



569. BOLTONIA. Schrebcr, 



Calix imbricated. Raijs numerous. JReccp- 

 tack conic, punctate. Seeds flat and marginat- 

 ed. Pappus consisting of many minute setae, 

 with 2 of them opposite and mostly elongated. 



Herbaceous; leaves entire; stems divaricately branched; 

 peduncles terminal, 1-flowered. Rays pale violet. 



Species. 1. 15. gh-ttifolin. The leaves when bruised 

 smell somethinji^ like Fennel. 2. asteroides. — The only 

 species of the genvis. 



570. BELLIS. />. (Daisy.) 



Calix hemispherical: leaflets equal. Seed ob- 

 ovate. Receptacle naked, conic. Pappus none. 



Leaves radical; scapes l-flowered; rays while or pur- 

 ple. The caulescent species ought probably to be .sepa- 

 rated. 



Species. 1. B. intc^rifoUa. No botanist has yet col- 

 lected this plant since Michaux. Is it not an Eclipta? 



571. CHRYSANTHEMUM. L. (Ox-eye.) 

 Calix hemispherical, imbricate; innermost 



scales scariose. Receptacle naked. Pappus none. 



Stem simple or branched; leaves simple or pseudopin- 

 nate; flowers terminal, solitary or corymbose. 



Species. 1. C. Lcucantheimim. Introduced, and now 

 abundantly naturalized in the middle states. 2. arcticum. 

 In North California. 



572. PYRETHRUM. Gctrtner, Smith. (Fever- 



few.) 

 Calix hemispherical, imbricate, scales partly 

 acute, with scariose margins. Receptacle naked. 

 Pappus marginal. 



Stem branclied; leaves entire or pseudopinnate; pedun- 

 cles branched, coiymbose or solitary. 



Species. 1. P. serotinum.—An European genus. 



