SYNGENESIA. FRUSTRANEA, 177 



or entire margin, very obtuse, about 10. — A very distinct 

 genus, but evidently allied to Galardia. f 



589. HELIANTHUS. L. (Sunflower.) 



Calix imbricated, subsquarrose, foliaceoiis. 

 Meceptade paleaceous, flat. Pappus paleaceous, 

 2-leaved, caducous. 



Herbaceous, rarely shrubby, often tall; leaves scabrous, 

 opposite, alternate or rarely vertlcillate; flowers axillary 

 or terminal, sometimes very large, disk in some species 

 dark brown. — Tube of the discal florets distinct, verj^ 

 short and narrow. 



Species. 1. H. tubceformis. Hab. On the banks of 

 the Missouri, particularly in the vicinity of the aboriginal 

 stations, being often cultivated by them for the seed whick 

 is dried and ground into meal for food. Nearly allied to 

 U. anjiuiis. 



2. atrorubem. Common throughout Upper Louisiana. 

 3. Ixtijlovus. 4. pnbescens. 5. divaricatus. 6. frondosus. 

 7. trachelifolius. 8. longif alius, Vu. 



9. * pauciflorus. Leaves opposite, linear-lanceolate, acu- 

 minate, serrate, nearly smooth; stem naked, trichotomous, 

 few-flowered; calix closely imbricated; leaflets ovate. 

 Hab. In Lower Louisiana. — Leaves sometimes ternately 

 vertlcillate, very long, paler beneath and somewhat pu- 

 bescent; ray and disk nearly the same colour. 4 or 5 feet 

 high. 



t ^^PP^'i^ leaves alternate. 



10. giganteus. /3. * crinitns. Leaves approximate, and 

 long, linear-lanceolate, acuminate, nearly entire, subses- 



f To the following very natural group of genera, Helenmni, 

 Leptopoda, Actinella, Galardia, and Balduina, I would propose 

 the name of GALARDiiE; presenting the following general cha- 

 racter. 



Common calix many-leaved, foliaceous, subequal or imbri- 

 cated. Radial florets semitrifid or 3-toothed, neutral or sty- 

 liferous. Discal florets viscidly glandular, 4 and 5-toothed, 

 tube minute. Receptacle hemispherical or globose, naked or 

 more rarely setose, punctate or very deeply favose. Seeds 

 obconic, mostly villous. Pappus paleaceous; leaflets 5 to lOj 

 naked or awned, united at the base. 



Herbaceous, (one species of Actinella shrubby); leaves 

 alternate, entire, rarely all radicah flowers terminals pe- 

 dunculate. 



