438 



SYNGENESIA FRUSTRANEA. 



8. Senifolia. Mich. 



u 



C. pubescens; foliis I Pubescent; leaves 

 sessilibus; trifoliolatis J sessile, trifoliate, the 

 foliolis lanceolatis, in- I leaflets lanceolate, en- 

 tegerrimis; radiis inte- tire; florets of the ray 

 gris; seminibus cunea- | entire; seed cuneate. 

 lis. 



$^ 



j" 



Mich. 2. p. 138. Sp- pL 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 involucrum as long as +he 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 tlie 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 — Augxist. 



9. Verticillata. 



^ 



+ 



C. subglabra; foliis I Nearly glabrous; 



oppositis, ' sessiUbus, 

 trifoliolatis, interdum 

 c|uinato-pinnatis, folio- 

 lis lineari-lanceolatis, 

 integerrimis; radiis rets of the ray acute, 



leaves opposite, sessile; 

 trifohate, sometimes 

 quinate; leaflets linear- 

 lanceolate, entire; flo- 



acutis; seminibus obo 



? 



seed 



ob o V ate, 



very 



slightly 2-toothed. 



vatis, laevissime biden- 

 tatls. 



I 



Sp. pi. 5. p. 2151. Walt. p. 214. Mich. 2. p. 139- Pursh, 2. p- 56P- 

 Nutt. 2. p. 180. 



