Senecio.} COMPOSITE. 147 



naked. Flowers discoid or radiant. Pappus simple, sessile. 

 Name ; senex, an old man. See Erigeron. 



Syngenesia. Superflua. 



s|c Flowers without rays. 



1. S. vwgarig, Linn. Common Groundsel. Leaves pinna- 

 tifid, toothed, clasping at the base ; flowers in clustered corymbs, 

 destitute of a ray. Br. Fl. I. p. 360. E. Fl. v. iii. p. 428. E. 

 Bot. t. 747. 



Waste ground, fields, and hedges. FL all summer. Q. A span 

 to a foot high. Flowers small, yellow. 



* * Flowers rayed, with the ray rolled back. 



2. S. viscosus, Linn. Stinking Groundsel. Ray revolute; 

 leaves pinnatifid and viscid ; scales of the involucre lax, hairy ; 

 stem branching, diffuse. Br. Fl. 1. p. 3GO. E.FLv.in.p. 

 429. E. Bot. t. 32. 



Waste and sandy grounds near Dublin, as well as about Cork, Bel- 

 fast, and other places. FL July, Aug. 0. Stems one to two feet 

 high, much branched and spreading ; remarkable for its viscid hairs and 

 fetid smell. 



3. S. sylvaticus, Linn. Mountain Groundsel. Ray revo- 

 lute ; leaves sessile, pinnatifid, lobed and toothed, often eared 

 at the base ; outer scales of the involucre very short, glabrous ; 

 stem erect, straight; flowers corymbose. Br. Fl. 1.^.360. 

 E. Fl. v. iii. p. 430. E. Bot. t. 748. 



Waste grounds and dry upland mossy soils. Tittour, near Round- 

 wood. Waste ground near Cork ; Mr. J. Drummond. Near Lame; 

 Mr. Templeton. FL July 0. One foot high. Leaves finely divided. 

 Plant with a disagreeable smell, but not so powerful as S. viscosus. 



* * * Flowers with patent rays. Leaves pinnatifid. 



4. S. tenuifolius, Jacq. Hoary Ragwort. Ray spreading, 

 its corollas oblong; leaves closely pinnatifid, their margins 

 somewhat revolute, pale and downy beneath ; stem erect, 

 loosely cottony ; all the fruit hairy. Br. Fl. 1. p. 361. E. Fl. 

 v. iii. p. 432. E. Bot. t. 574. 



Hedges and road-sides, both on the north and south side of Dublin, 

 frequent. FL July, Aug. 1. Allied to the following. Leaves 

 deeply pinnatifid, dark green above, whitish beneath. Flowers bright 

 yellow. 



5. S. Jacobeea, Linn. Common Ragwort. Ray spreading, 

 oblong, toothed ; leaves doubly pinnatifid, somewhat lyrate, 

 with spreading, toothed, smooth segments; seeds of the disk 

 silky. Br. Fl. 1. p. 361. E. Fl. v. Ill p. 433. E. Bot. t. 

 1130. 



