438 
SYNGENESIA FRUSTKANEA. 
8. Senifolia. Mich. 
C. pubescens; foliis 
sessilibus; trifoliolatis, 
foliolis lanceolatis, in- 
tegerrimis; radiis inte- 
gris; seminibus curie a- 
tis. 
Pubescent; leaves 
sessile, trifoliate, the 
leaflets lanceolate, en- 
tire; florets of the ray 
entire; seed cuneate. 
Mich. 2. p. 138. Sp. pi. 3. p. 2254. Pursh, 2. p. 568. Nutt. 2. p. 
180. 
C. Major, Walt. 214. 
Root perennial. Stem two to three feet high, generally branching near 
the summit, pubescent, angled. Leaves opposite, closely sessile, trifoliate, 
forming apparently a six-leaved verticill, leaflets lanceolate, slightly acumi- 
nate, pubescent. Peduncles opposite, brachiate, forming a terminal co- 
rymb. Exterior invulucrum as long as the interior, both very pubescent. 
Florets of the ray about eight, narrow lanceolate, yellow, externally pubes- 
cent, slightly toothed near the summit. ( Seeds oblong, cuneate, Mich.) 
The whole plant sometimes nearly glabrous, Mich. In a specimen which 
I possess that appears to belong to the glabrous variety of Mich, the middle 
leaf of the verticill is sometimes three-parted, which I have never observed 
in the common plant, and the exterior involucrum is much smaller than the 
interior; these characters seem to indicate a distinct species. 
Grows in dry pine lands. 
Flowers June — August. 
9. Verticillata. 
C. subglabra; foliis 
oppositis, sessilibus, 
trifoliolatis, interdum 
quinato-pinnatis, folio- 
lis lineari-lanceolatis, 
integerrimis; radiis 
acutis; seminibus obo- 
vatis, laevissime biden- 
tatis. 
Sp. pi. 3. p. 2151. Walt. p. 214. 
Nutt. 2. p. 180. 
Nearly glabrous; 
leaves opposite, sessile; 
trifoliate, sometimes 
quinate; leaflets linear- 
lanceolate, entire; flo- 
rets of the ray acute, 
seed obovate, very 
slightly 2-toothed. 
Mich. 2. p. 139. Pursh, 2. p. 569. 
