90 SYNGKNESIA, ^QUALI^. ^ 
Lion^s-foot. Dr. TFiWs Snake-root. 
Seldom exceeding two feet and a half in height, and not 
unfrequently flowering much under tliis size. 1 cannot think, 
as Mr. Nuttall has intimated, that this plant is scarcely more 
than a variety of P. alba, for I have met with hundreds of spe- 
cimens of it in a pedestrian journey through Maryland, con- 
stantly presenting the same aspect and characters, and found it 
in company with P. alba, which latter is always a much larger 
plant, frequently attaining a height of six feet. On the border 
of woods about 9 or 10 miles south-west of Philadelphia, not 
far from the Chester-road. Very rare in this vicinity. Stem and 
flowers dingy-purple and yellow. Possesses medicinal virtues. 
(Pursh.) Perennial. September. 
rubicunda. 4. P. Icaves ciHate^ radical,, liastate-angfllar, sub- 
entire; lower ones obovate, attenuate at the 
base, subangular ; the upper ones lanceolate, 
very entire; raceme simple, flowers nutant. — 
Willd. and Pursh. 
P. alba, /3. Sp. PI. 1122. 
P. autumnaiis, Gron. FI. Virg. p. 89. 
About fifteen or eighteen inches high. On the edge of the 
woods near the Lancaster turnpike-road, 9 or 10 miles from 
Philadelphia, frequent. Perennial. August, September. 
301. LACTUCA. Gen. pi. 1234. {Cichoracea,) 
Calix imbricated, cylindric, margin (of the 
segments) membranaceous. Receptacle na- 
ked. Pappus simple, stipitate. Seed even. 
— J\Tutt. 
eiongata. 1 . L. leaves smooth beneath, lowest ones runcinate, 
very entire, amplexicaule ; lower ones dentate, 
upper ones lanceolate ; flow'ers corymbose-pani- 
culate. — Willd. enum. 
L. longifolia, Mich. 
Long-leaved Wild-lettuce. Fire-weed. 
From three to six feet high. Flowers small, yellowish. On 
the borders of fields, in woods, and on road-sides, very com- 
mon, Biennial. August, September. 
