3YNGENE3IA NECESSARIA. 
465 
7. Integrifolium. Mich. 
S. caule tetragono, 
aspero; foliis oppositis, 
sessilibus, oblongis, in- 
tegerrimis, scabris; flo- 
ribus paucis, breviter 
pedunculatis. 
Stem four-angled, 
rough; leaves opposite, 
sessile, oblong, entire, 
scabrous; flowers few, 
on short peduncles. 
Mich. 2. p. 146. Spl. pi. 3. p. 2333. Pursh, 2. p. 57 8. Nutt. 2. p. 
183. 
Stem square, rough. Leaves all uniform, opposite, sessile, erect, oblong, 
oval, very scabrous on the upper surface. Flowers few, on short peduncles. 
Mich. From the mountains of Carolina Dr. Macbride brought specimens 
nearly allied to this species, differing in a few particulars. Stem nearly 
terete, glabrous, the peduncles slightly angled. Leaves oblong, ovate or 
oval, acute, entire, scabrous on both surfaces, on short somewhat connate 
petioles. Flowers not numerous. Scales of the involucrum oblong, ovate, 
glabrous, slightly fringed, all nearly of one length. Florets of the ray four- 
teen, rather more than an inch long, of a very brilliant yellow. 
The original S. Integrifolium of Mich, was collected in the state of Illi- 
nois and may be distinct. 
Flowers August — September. 
8. Levigatum. Pursh. 
S. caule simplici, te- 
tragono, sulcato, gla- 
bro; foliis oppositis 
sessilibus, ovatis, acu- 
minatis, tenuissime ser- 
ratis, basi subcordatis, 
utrinque glabris; in- 
volucri squamis ovatis, 
ciliatis. 
Stem simple, 4-an- 
gled, furrowed, gla- 
brous; leaves opposite, 
sessile, ovate, acumi- 
nate, very slightjy ser- 
rate, somewhat cor- 
date at base, glabrous; 
scales of the involu- 
crum ovate, ciliate. 
Pursh, 2. p. 578. Nutt. 2. p. 183. 
Stem about two feet high. Flowers in a compact corymb. Pursh. 
The plant I am about to describe agrees in so many respects with this 
species, that it probably belongs to it. F or the differences it will perhaps 
be easy to account. 
VOL. H. N 8 
