128 
SYNGENESIA. ZQUALIs. 
_ 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. 
Spectes. 1.T. * ylaucum. Smoothand glaucous; leaves 
linear-ensiform, fiat, entire and naked, shorter than the 1- 
flowered scape; leaves of the calix imbricated, acuminate, 
pubescent. Haz. On the grassy plains of Upper Louisia- 
na, near Fort Mandan; rare. Flowering in July and Au- 
gust. 7 glaucum. 'T.N.in Fras. Catal. 1813. Px. 2. p. 
2. * marginatum.. Scape 1-fiowered, ‘somewhat pubes- 
cent; leaves linear-lanceolate, acumingte, margin subun- 
date, floccosely pubescent; leaves of ‘the ecalix imbrica- 
ted, acuminate; smooth. J. cuspidatum, Pu. 2. p. 742. 
Has. On the grassy plains of Upper Louisiana; common. 
Fl. in April'and May. Allied to 7’. lanatum. of Palestine. 
Flowers of both species yellow. 
A North American genus with the exception of 7’. /ana- 
tum. 
tt Fuoscvrosx. (Florets all tubular; border 5- 
cleft.) s 
535. STOKESIA.-L’ Heritier, Sert. Angl. p. 28. 
Calix foliaceous, subimbricate. Corolla ra- 
i - diate, florets of the ray funnelform and irregu- 
dar. Receptacle naked. Pappus 4 sete. 
536. 
_ Herbaceous and caulescent; leaves lanceolate, pedun- 
cles solitary, 1-flowered. i 
Species, 1. 8. cyanea. Flowers blue.—The only spe- 
cies of the genus, indigenous to South Carolina. 
ARCTIUM. L. Lapra. Jussieu. (Burdock.) 
Calix globose; scales hooked inwards at the 
_ points. Receptacle paleaceous. Pappus setosely- 
ore 3 
ES ae 
terminal. 
Srecres. 1. A. 7 Mitciahiocd scound wexthesiente 
as in Europe; introduced. The calix remarkable for its 
Ma Js. PE * ou 
~ ae 
an and cordate, unarmed; flowers p ium, 
tte pono abated 
i 
