SYNGENE9IA. SUPERl"tUA. 173 



584. HELENIUM. L, (American Sneezewort) 

 Calix simple^ many parted. Rays of the flower 



semitrifid. Receptacle naked, globose; the rays 

 only paleaceous. Seed villous; pappus palea- 

 ceous, about 5-leaved, leaflets awned. 



Herbaceous; leaves alternate, decurrent; flowers ter- 

 minal, pedunculate, subcorymbose. — Discal florets 4 and 

 5- toothed, externally viscid and glandular; anthers bise- 

 tose, or bifid at the base as in Inula; it appears, however, 

 both by external and sensible properties more nearly allied 

 to Galardia. 



Species. 1. H. autumnale. Very common. Flowers 

 large and bright yellow; the whole plant is intensely bit- 

 ter, with something of the aroma of Anthemis nobilis, and 

 would probably answer all its medicinal properties. 2. ca- 

 naliculatum^ -f"* 3. guadridentatum. v. v. Near New Or- 

 leans. 

 A North American genus, indigenous to river marshes. 



585. ACTINELLA. Jussieu, 



Calix many -leaved, subequal, flat. Rays (8 

 to 20), S-toothed, wider towards the extremity. 

 Receptacle naked^ hemispherical. Pappus pa- 

 leaceous, 5 to 8-leaved, leaflets awned. 



Stemless or caulescent and suffruticose; leares entire, 

 alternate; scape or terminal peduncle elongated, naked, 

 1-flowered. — Flower concolor (yellow.) Diskal florets very 

 short, viscidly glandular? tube minute; anthers entire at 

 the base; seeds villous. Nearly allied to Galat^dia^hut th& 

 rays are distinctly styliferous, and the receptacle naked. 



Species. 1. A. acauHs. Scape naked, 1-flowered; 

 leaves linear-spathiilate, entire, villous; rays 8 to 10. 

 Galardia acaidis, Ph. Fl. Am. 2- p. 743. 



Obs. Perennial. Roots fibrous, aggregated in dense tufts. 

 Leaves circularly aggregated, linear- spathulate, punctate, 

 sericeously villous in common with the scape and calix, 

 axills of the membranaceous sheathes conspicuously pi- 

 lose, (length 2 to 3 inches, breadth 3 or 4 lines.) Scape 8 

 to 12 inches long. Leaflets of the calix oblong-lanceolate, 

 subequal, irregular, about 2 series, densely villous. Flow- 

 ers bright yellow, as large as those of Chamomile. Rays 

 8 to 10, 3 or 4 lines long and 2 broad, expanding to- 

 wards the extremity, rather deeply 3-touthed. Discai 

 p2 



