SYNGENESIA, ZEQUALIS. 89 
vements, and in turnpike-roads. In pastures, grass-plots, 
lds and road-sides, every where abundant. It is possessed 
of medicinal properties, among which its diuretic power is 
universally known. Perennial. All summer. 

330. PRENANTHES. Gen. pl. 1236. ( Cichoracee.) . 
Flosculi definite, 5 to 20. Calix caliculate. 
Receptacle naked. Pappus simple, sub- 
sessile. : 
1. P. radical leaves angular-hastate, dentate, sub- alba. 
lobate ; those of the stem subrotund-ovate, den- 
tate, petiolate; upper ones lanceolate; panicle 
loose, fascicles terminal, nutant; calices 8-fid, 
9-10-flowered.—/Filld. and Pursh. 
P. suavis, Parad. Lond. 85. 
Icon. Bot. Mag. 1079. 
Whiteflowered Wild Lettuce, or Ivy-leaf. 
From two to five feet high. Leaves thick; flowers yellow- 
 ish-white; calices purple. On the edges of shady woods; not 
rare. Perennial. August, September. 
2. P. stem paniculate above; -leaves petiolate, com 
cordate, dentate, ciliate; floral leaves sessile, 
oblong, very entire; panicle loose, raceme- | 
flowered ; flowers nutant ; calices 6-cleft, 6-flow- i 
ered.— Willd. hort. berol. 25, and Pursh. 
From eighteen inches to two and a half feet high. Leaves 
thin, or semi-membranaceous. Flowers slender, whitish-yel- 
~ low. In shady woods; rare. Perennial. August, September. 
S. P. leaves dentate, rough ; those of the root pal- Serpentaria. 
mate-sinuate, of the stem long, petiolate, sinu- | 
ate-pinnatifid, nearly three lobed; intermediate 
divisions three-parted, upper ones lanceolate ; 

racemes terminal, subpaniculate, short, nutant; Pe 
calices 8-cleft, 12-flowered.—Pursh. 
P. Serpentaria, Pursh. 
¢ Icon. Pursh. Fl. Am. Sep. vol. 2. t. 24. "i 
ie VOL. II. 9 % 
7 
fF 
