SYNGENESIA NECES3ARIA. 
471 
POLYMNIA. Gen. Pl. 1335. 
Involucrum duplex; 
exterius 4 — 5 phyllum; 
interius 10-phyllum, 
foliolis concavis. Re- 
ceptaculum paleaceum. 
Pappus nullus. 
Involucrum double, 
the exterior 4 — 5 leav- 
ed, the interior 10- 
leaved, leaves concave. 
Receptacle chaffy. 
Pappus 0. 
1. Canadensis. 
P. viscido-villosa; 
foliis denticulatis acu- 
minatis, inferioribus 
pinnatifidis, superiori- 
bus trilobis, integrisve. 
Viscid, villous; leaves 
denticulate, acuminate, 
the lower pinnatifid, 
the upper three lobed 
or entire. 
Sp. pl. 3. p. 2335. Mich. 2. p. 147* Pursh, 2. p. 579- Nutf. 2. p, 
183. 
Stem two to four feet high, villous, somewhat scabrous. Leaves some- 
what ovate, thin, slightly scabrous, finely serrate, the upper entire in the 
outline, the lower becoming deeply lobed and pinnatifid. Flowers in a 
loose terminal panicle. Peduncles and scales of the involucrum very viscid 
and villous. Florets of the ray ten, small, yellow. 
Grows in the mountains of Carolina, Dr. Macbride. 
Flowers July — September. 
2. UvEDALIA. 
P. foliis oppositis, 
trilobis, acutis, in peti- 
olum decurrentibus, 
lobis anguloso-sinuatis; 
radiis elongatis. 
Leaves opposite, 3- 
lobed, acute, attenua- 
ted to a petiole, lobes 
angled and sinuate; flo- 
rets of the ray long. 
Sp. pl. 3. p. 2335. Walt. p. 216. Mich. 2. p. 147. Pursh, 2. p. 579* 
Nutt. 2. p. 183. 
Root perennial. Stem three to five feet high, terete, slightly sulcate, vil- 
lous, scabrous, branches generally ternate. Leaves opposite, sometimes 
