SYNGENESIA NECESSARIA. 
477 
Grows in rich soils, in the upper districts of Carolina and Georgia. 
Flowers August — September. 
2. Elatior. Lin. 
A. foliis bipinnatifi- 
dis, glabriusculis; peti- 
olis Ionge ciliatis; ra- 
cemis terminalibus; 
caule virgato. 
Leaves bipinnatifid, 
nearly glabrous; peti- 
ole conspicuously frin- 
ged; racemes terminal; 
stem virgate. 
Sp. pi. 4. p. 376. Pursh, 2. p. 581. Nutt. 2. p. 186. 
Stem four to seven feet high, when young pubescent. Upper leaves al- 
ternate, the lower sometimes opposite, all bipinnatifid with segments acute, 
somewhat hairy. Flowers in paniculate racemes. Heads of the male flo- 
rets globular; involucrum sprinkled with hairs, slightly and irregularly 
lobed; corolla white. Fertile florets in small distinct clusters; styles two. 
Nut crowned with six short spines. 
Grows in pastures and rich soils, in the upper districts of Carolina and 
Georgia. 
Flowers July — September. 
Artemisifolia. Lin. 
A. foliis bipinnatifi- 
dis, subtus canescenti- 
bus, summis pinnatifi- 
dis; race mis ter nis, ter- 
minalibus; ramis fasti- 
giatis. 
Leaves bipinnatifid, 
hoary underneath, the 
uppermost pinnatifid; 
racemes by threes, ter- 
minal; branches fasti- 
giate. 
Sp. pi. 4. p. 376. Pursh, 2. p. 581. Nutt. 2. p. 
A. Absynthifolia, Mich. 2. p. 183. 
Stem four to six feet high, branching and with the leaves a little pubes- 
cent. Leaves sometimes opposite at base, alternate towards the summit, 
generally bipinnatifid, the segments larger and more distant than in the pre- 
ceding species, nearly glabrous on the upper surface, pubescent and hoary 
underneath; racemes scattered, loosely paniculate. Heads of male florets 
Small, globular; female florets remote, axillary, sessile. Spines of the fruit 
very short, acute. 
Grows in the mountains of Carolina, Mich. 
Flowers August — September. 
