SYNGENESIA FRUSTRANEA. 
439 
Root perennial. Stem erect, two to three feet high, angled, striate, gla- 
brous, branching near the summit. Leaves sessil^*forming , “a ,, six-leaved 
verticill. The middle leaflet of each leaf frequently three-parted, the leaflets 
all narrow, apparently smooth, yet frequently covered with a fine pubes- 
cence. Flowers corymbose, peduncles opposite and terminal. Exterior 
involucrum generally ten-leaved, leaflets small, linear obtuse, irregularly 
arranged at base; interior eight-leaved, leaflets lanceolate, yellowish, and 
reflected at the summit. Florets of the ray eight, lanceolate, acute, yellow; 
of the disk numerous, yellowish. Anthers dark purple. Seeds compressed, 
winged, slightly bidentate. Chaff of the receptacle filiform, dilated at the 
summit. 
Grows in dry soils. 
Flowers June — August. 
10. Tenuifolia. Willd. 
C. glabra; foliis op- 
positis, sessilibus, tri- 
foliolatis, foliolis com- 
posite multipartitis, 
segmentis linearibus, 
integerrimis. 
Glabrous; leaves 
opposite, sessile, trifo- 
liate, leaflets compoun- 
dly many parted, seg- 
ments linear, entire. 
Sp. pi. 3. p. 2252. Pursh, 2. p. 569. Nutt. 2. p. 180. 
C. Verticillata, var. Tenuifolia, Mich. 2. p. 139. 
Root perennial. Stem two to three feet high, glabrous, branching to- 
wards the summit, slightly angled. Leaves sometimes deeply three-parted, 
sometimes seeming to form a verticill of six distinct leaves, the divisions or 
leaves all many parted, sometimes compoundly, the segments all linear 
and entire. Flowers corymbose. Peduncles opposite and terminal. Ex- 
terior involucrum nearly as large as the interior, leaflets about eight, narrow 
and lanceolate. Florets of the ray eight, yellow, acute. The seed of this 
species I have not had an opportunity of examining. 
Grows in the upper districts of Carolina. Dr. Macbride, 
Flowers July and August. 
11. Trichosperma. Mich. 
C. glabella; foliis 
subquinato - pinnatis, 
lineari-lanceolatis, ser- 
ratis; floribus corym- 
bosis; involucri exteri- 
Glabrous; leaves ge- 
nerally quinate, pin- 
nate, linear-lanceolate, 
serrate; flowers in co- 
rymbs; leaves of the 
