w 



468 



SY^GENESIA NECESSARIA, 



but the leaves of the former are ovate, while in the latter they are nairow 

 lanceolate, more pubescent underneath, and the corymb more diffuse. 



Grows in the mountainous districts of Carolina and Georgia. 



Flowers August — October. 



12, Atropurpureum- Retz. 



S. caule tereti, laevi; 

 foliis siibquaterno-ver- 

 ticiilatis, lanceolatis, 



Stem terete, smooth; 

 leaves verticillate by 

 fours, lanceolate, sca- 



scabris, subintegerri- brous, nearly entire 

 mis, subsessilibus, basi and sessile, ciliate at 

 ciliatis, superioribus | base, the upper ones 

 sparsis; panicula dicho- I scattered; panicle 



toma. 



chotomous. 



ith 



Sp. pi. 3. p. 2334. Pursh, 2. p. 579- 



Stem about four feet high, dark purple, somewhat densely clothed w 

 leaves; the lowest leaves alternatej the next ternate, then quaternate or 

 rather in approximating pairs; the uppermost scattered, all lanceolate, den- 

 ticulate; scabrousj with the midrib dark purple, on short fringed petioles. 

 Florets of the ray very narrow. 



This species I have not seen; it is considered by Mr. Nuttall as a vanet) 



of the preceding. 



Grows in Carolina and Georgia, Pursh. 

 Flowers xVugust — September. 



13. Dentatum. 



E. 



S. 



1 



caule 



erectum, 



Stem erect, some- 



siibglabro; foliis inferi- what glabrous; lower 

 oribus oppositis, supe- leaves opposite, 

 rioribus alternis, omni- upper alternate. 



bus lanceolatis, sinua 

 to-dentatis, pilosis, sca- 

 bris; floribus corymbo- 



involucri squamis 



sis; 



lato-ovatis, ciliatis. 



lanceolate 

 toothed 



} 



? 



hairy, 



the 



all 

 sinuate 



sca- 



j 



brous; flowers in co- 

 rymbs; scales of the 

 involucrura broad, o- 

 vate, ciliate. 



