T "^ 



46t> 



SYNGENESIA NECESSARIA. 



1 



Stem about two feet high, slightly angled, glabrous. Root leaves oblong 

 lanceolate, on petioles one to two inches long. Lower stem leaves ova! 

 lanceolate, on short petioles which are connate at base; the upper closely 

 sessile, ovate, the highest almost cordate, all glabrous, slightly acuminate, 

 finely fringed and all but the uppermost serrate. Flowers rather small, in 

 a somewhat compact corymb. Scales of the involucrum ovate, ciliate, the 

 exterior much smaller than the interior, rather acute. The leaves of this 

 species are intensely bitter. _ 



Pursh's description was made from plants collected by Mr. Enslen m 

 Georgia between Savannah and Louisville. My specimens were collected 

 in the western districts of Georgia. 



Flowers August — September. 



9. ScABERRliMUM 



E 



S. Caule 



subangula. 



Stem somewhat an 



to, angulis superne sea- [ gled, the angle rough 

 bris; 



bliis ovatis, sub- 



acuminatis, 



serratis 



) 



rigidis, utrinque sca- 

 berrimis, breviter peti- 



towards 



the 



summit; 



leaves ovate 



9 



acuminate 



9 



olatis 



J 



floribus subco- 



rymbosis; involucri 

 squamis ovatis, ciHatis. 



E. 



slightly 



serrate, ri- 



both 



gid, scabrous on 

 surfaces, on short peti 



oles; flowers corym 



bose; scales of the in- 

 volucrum ov ate, cihate. 



becoming 



Sfem three to four feet high, very robust, angled when young, . 



terete and glabrous when old. Leaves on short petioles which as usual m 

 this genus, are somewhat connate, three to four inches long, rather mor^ 

 than two wide, acutely serrate, resembling those of a rough leaved Helian- 

 thus. Flowers in a somewhat compact corymb. The exterior scales o 



corapiact corymb 

 the involucrum comparatively small, rather acute, scarcely scabrous. 

 refa of the ray twelve to fourteen, about an inch long. Seed nearly circuia 

 winged, deeply emarginate. 



Grows in the v?estern districts of Georgia. 



Flowers August — September. ' 



> 



10. Trifoliatlm. 



Lin. 



S. caule 6-angulato, 



Stem 



six-ang 



led 



9 



laevi 



5 



cillati 



foliis terno verti- smooth; leaves verti 

 ;, ovato-lanceo- j ciliate by threes, ovate 



