SYNGENESIA.— SUPERFLUA. 275 



spreading spinous scales. Recept. pitted. Pap- 

 pus capillary, deciduous, scabrous. 



471. CNICUS. Cal. ventricose, imbricate with spi- 



nous scales. Recept. hairy. Pappus decidu- 

 ous, plumose. 



472. LIATRIS. Cal. oblong, imbricate. Recept. na- 



ked. Pappus plumose, persistent, (mostly co 

 loured.) Seed pubescent, striate, obconic. 



473. VERNONIA. Cal. ovate, imbricate. Stig. bi- 



fid. Pappus double ; exterior short and chaffy ; 

 interior capillary. 



* * * Florets all tubular, erect, forming a nearly 

 level top. 



474. KUHNIA. Cal. imbricate, cylindric. Recept. 



naked. Pappus plumose, sessile. Seed pubes- 

 cent with numerous striae. 



475. EUPATORIUM. Cat. imbricate, oblong. Style 



much exsert, deeply cleft. Recept. naked. 

 Pappus scabrous. Seed 5-Btriate, or angular. 



476. MIKANIA. Cal. 4— 6-leavecI, 4— 6-flowered. 



Recept. naked. Pappus hairy. 



477. CHRYSOCOMA. Cal. imbricate, oblong or he- 



mispherical. Style scarcely exserted. Recept, 

 naked. Pappus hairy, scabrous. Seed pubes- 

 cent. 



478. CACALIA. Cal. cylindric, scaly at the base. 



Recept. naked. Pappus hairy. 



479. SPAKGANOPHORUS. Cal. subglobose, imbri- 



cate ; scales recurved at the point. Recept. 

 naked. Seed crowned with a cartilaginous 

 shining cup. 



SUPERFLUA. 



* Florets of the ray obsolete. 



480. TANACETLIM. Cal. imbricate, hemispherical ; 



scales acuminate. Rays oi" the corolla obsolete, 

 tritiil. Recept. naked. Pappus somewhat mar- 

 gined. 

 161. ARTEMISIA. Cal. ovate, imbricate; scales 

 rounded, connivent. Florets of the ray subu- 

 late. Recept. subvillous or naked. Pappus 



