128 SYNGElfESIA. -E^UALIS. 



row and entire. Leaflets of the calix indefinite, disposed 

 in an irregular double or triple series; seed cylindric and 

 attenuated, marked with 10 longitudinal ridges; pappus 

 copious, sessile, pilose, white, only simple to the naked 

 eye, partly plumose, seen through "a lens. 



Species. l.T. * trUiucum. Smooth and glaucous; leaves 

 linear-ensiform, flat, entire and naked, shorter than the 1- 

 fiowered scape; leaves of the calix imbricated, acuminate, 

 pubescent. Hab. On the grassy plains of Upper Louisia- 

 na, near Fort Mandan; rare. Flowering in July and Au- 

 gust. T.glauciun. T. N. in Fras. Catal. 1813. Ph. 2. p. 

 505, and 742. 



2. * marginatum. Scape l-flowered, somewhat pubes- 

 cent; leaves linear-lanceolate, acuminate, margin subun- 

 uate, fioccosely pubescent; leaves of the calix imbrica- 

 ted, acuminate, smooth. T. cvspidatiim. Vn. 2. p. 742. 

 Hab. On the grassy plains of Upper Louisiana; common, 

 Fl. in April and May. Allied to T. lanattun. of Palestine. 

 Flowers of both species yellow. 



A North American genus with the exception of T. lana- 

 turn. 



f f FLOscrLos^. (Florets all tubular; border 5- 

 clcft.) 



535. STOKESIA. VHeritier, Scrt. Angl. p. 28. 

 Calix foliaceous, subimbricate. Corolla ra- 

 diate, florets of the ray funiielform and irregu- 

 lar. Receptacle uiiktA. Pappus 4 setx. 



Herbaceous and caulescent; leaves lanceolate, pedun- 

 cles solilary, l-flowered. 



Species. 1. S.ci/anea. Flowers blue. — The only spe- 

 cies of the genus, indigenous to South Carolina- 



536, ARCTIUM. L, Lappa. Jitssicn. (Burdock.) 

 Calix ii;]obose; scales iiooked inwards at tlie 



points. ^ecqjfacZe paleaceous. Paj^pts sctosely- 

 paleaceous. 



I^eaves large and cordate, unarmed; flowers paniculate, 

 terminal. Kecei)tacle setose; florets purple. 



SPECIES. 1. A. Lappa. Naturalized around settlements 

 £s in F.urope; introduced. The calix remarkable for its 

 adherence to clothing and to the hides of domestic ani- 

 mals. 



