274 SYNGENESIA.— SUPERFLUA. 



482. BACCHARIS. Cal. imbricate, cylindric ; scales 



ovate, subcoriaceous. Fertile florets mixed 

 with the perfect. Recept. naked. Pappus 

 hairy. 



483. CONYZA. Cal. imbricate ; scales often sub- 



scarious. Recept. naked. Marginal florets fer- 

 tile, 3-cleft. Pappus simple and capillary. 



484. GNAPHALIUM. Cal. imbricate ; scales scari- 



ous, mostly coloured. Recept. naked. Florets 

 of the ray subulate ; fertile florets entire. Pap- 

 pus scabrous. 



* * Florets of the ray ligulate. 



485. ER1GERON. Cal. imbricate, subhemisphericaL 



Florets of the ray very numerous and narrow. 

 Recept. naked. Pappus double ; exterior mi- 

 nute ; interior hairy, of few rays. 



486. INULA. Cal. imbricate. Florets of the ray nu- 



merous, (yellow.) Recept. naked. Pappus sim- 

 ple, scabrous ; (sometimes with a minute exte- 

 rior chaffy pappus.) 



487. ASTER. Cal. imbricate, with the lower scales 



often spreading. Florets of the ray generally 

 more than 10, rarely fewer, (not yellow.) Re- 

 cept. naked. Pappus simple. 



488. SOLIDAGO. Cal. imbricate, scales connivent. 



Florets of the ray about 5, (yellow.) Recept. 

 naked. Pappus simple, scabrous. 



489. ARNICA. Cal. hemispherical ; leaflets equal, 



longer than the disk. Recept. naked. Pappus 

 simple, hairy. Florets of the ray (yellow) of- 

 ten destitute of anthers. 



490. SENECIO. Cal. subcylindric, equal, scaly at 



the base ; scales withered at the points. Re 

 eept. naked. Pappus simple. (Rays sometimes 

 wanting.) 



491. TUSS1LAGO. Cal. simple, equal, membrana- 



ceous, swelling. Recept. naked. Pappus sim- 

 ple, sessile. (Flowers mostlv discous.) 



492. BOLTONIA. Cal. imbricate. Rays numerous. 



Recept. conic, punctate. Seeds flat and sub- 

 marginate. Pappus consisting of many minute 



