V 



\ 



SYNGENESIA FRUSTRANEA. 439 



J 



Root perennial. Stem erect, two to three ket higli, angled, striate, "gla- 

 brous, branching near the summit. Leaves sessile, 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 

 tnvolucrim generally tea-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. AfUhers dark purple. Seeds compressed, 

 wmged, slightly bidentate. Chaff of the receptacle filiform, dilated at the 



Simimxt. • 



Grows in dry soils. 

 Flowers June — August 



10. Teinuifolia. Willd. 



r 



C. glabra; foliis op 

 positis, sessilibus, tri 

 foliolatis^ foliofis com 



Glabrous: leaves 



5 



opposite, sessile, trifo 

 liate, leaflets compoun 



posite multipartitis, dly many parted, seg- 

 segmentis linearibus, ( ments linear, entire, 

 mtegerrimis. 



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. 



* lowers July and August. 



n. Trichosperma. Mich, 



C. glabella; foliis I Glabrous; leaves ge- 



-^-v 



subquinato - pianalis, | nerally quinate, pin 

 "neari-Ianccolatis, ser- { nate, linear-lanceolate 



, axAXV^u,* *M,*xv..^vyACK.v^, 



ratis; floribus coryra- serrate; flowers in co- 

 nosis; mvolucri exteri- | rymbs; leaves of the 



