94 
Lappa, 
SYNGENESIA, AQUALIS. 
Hyosceris amplexicaulis, Mich. 
H. prenanthoides, Willd. 
H. biflora, Walt. —- 
Tragopogon Virginicum, Sp. Pl. 1111. 
‘Troximon Virginicum, Gert., Pers., Pursh. 
Stem-clasping Swines’-succory. 
About afoot high. Flowers large, deep orange-yellow. In 
shady damp woods, meadows, and moist copses; common. 
Perennial. July, August. 
§ 2. Froscuros#. (Florets all tubular; border 5-cleft.) 
305. ARCTIUM. Gen. pl. 1253. ( Cinaracephale.) 
Calix globose; scales hooked inwards at the 
points. Receptacle paleaceous. Pappus 
setosely-paleaceous. 
1. A. stem-leaves cordate, petiolate-denticulate ; 
flowers paniculate, globose; calices smooth.— 
Willd. and Pursh. 
Icon. Woodville’s Med. Bot. vol. 1. t. 15. 
Burdock. 
Common Burdock perhaps has been introduced, but if so, 
it is throroughly naturalized, being found every where in old 
fields and wastes. From three to five feet high. Leaves very 
large, flowers purple. Biennial. July, August. 
306. CNICUS. Gen. pl. 1255. ( Cinarocephale.) 
_ Receptacle villous. Pappus capillary. Ca- 
lix ventricose. 
lanccolatus. 1, C, Jeaves decurrent, hispid, pinnatifid; seg- 
ments bilobed, divaricate, spinous ; calices ovate, 
with a gossamer pubescence ; scales lanceolate, 
spinous, spreading.— Willd. 
Carduus lanceolatus, Sp. Pl. 1149. 

