579 
SYNGENESIA NECESSARIA. Silphium. 
In North America. Ret%. 7/ . v. s. in Herb. Lam- 
bert. 
12. S. caule tereti laevi, foliis subquaterno verticillatis lan- 
ceolatis scabris subintegerrimis subsessilibns basi cilia- 
tis, superioribus sparsis, panicula dichotoma. — Willd. 
sp. pl. 3. p. 2334. 
In Carolina and Georgia. Lyon. 7/. Aug. Sept. v.v. 
Resembles the preceding ; but its purple smooth stem 
distinguishes it at first sight. 
13. S. caule petiolisque tomentosis, ramis unifloris, foliis 
alternis cordatis ovatis serratis petiolatis villosis, semi- 
nibus muticis. — Herb. Banks, mss. 
In Georgia. Bartram. 7/ . v. s. in Herb. Banks. 
14. S. foliis alternis petiolatis cordatis sinuatis, squamis caly- 
cinis obtusis. Herb. Banks, mss. 
In Cardina. % . v. s. in Herb. Banks. 
15. S. foliis alternis ovato-lanceolatis cordatis serratis obtusi- 
usculis villosiusculis. Herb. Banks, mss. 
In Florida. 7/ . v. s. in Herb . Banks. 
661. POLYMNIA. Gen.pl . 1335. 
1. P. viscido-villosa 5 foliis denticulatis acuminatis, inferio- 
ribus pinnatifidis, superioribus trilobis integrisve.— ■ 
Willd. sp. pl. 3. p. 2335. 
Icon. Amoen. acad. 3. t. l.f 5. 
in shady mountains: Canada to Virginia. 7/. June, 
July. v. v. Two or three feet high ; flowers yellow } 
the whole plant has a strong balsamic scent. 
2. P. foliis oppositis trilobis acutis in petiolum decurrenti- 
bus, lobis anguloso-sinuatis, radiis elongatis. — Willd. 
sp. pl. 3. p. 2335. 
P. maculata. Cav. ic. 3. t. 227. 
Icon. Pluk. aim. t. 83. f. 3. Meris, hist. 3. s. 6. t. 7« 
f. 55. Trew piet, suppi. 1 J 2. 
In the mountains of Virginia and Carolina. 7/ . July— 
Sept. v. v. From four to eight feet high, 
662. CHRYLSOGONUM. Gen.pl. 133;. 
1. C. pumilum, lanato- villosum ; foliis in petiolum angus- 
tatis ovalibus dentatis. — Willd. sp. pl. 3. p. 2337. 
Icon. Pluk. aim. t. S3, f. 4. t. 242. f 3. 
On dry hills : Virginia and Carolina. 7/. May, June. 
v, v. Not above a span high j flowers yellow. 
atropurpu - 
reum. 
tomento sum. 
elatum. 
reticulatum. 
canadensis». 
Uoedalid . 
virgimantlm. 
