242 DICOTYLEDONS. COMPOSIT.E. AslCV. 



cd, pappus as long as the florets of the ray, leaves lanceolate 

 obtuse, p. 242. — Mountnin pastures. 

 2. E. ulpimim, stems with usually only one flower, pappus much 

 shorter tlian the florets of the rav, leaves lanceolate, p. 242. 

 — Alpine rocks. 



27. TUSSILAGO. 

 Involucre simple, equal, submemhranaceouK, swelling. Receptacle 

 naked. Pappus simple. 



* Flowers rayed. Scape single-Jlowered. 

 \. T. Farfara, scape single-flowered imbricated with scales, 

 leaves cordate angular toothed downy beneath, p. 242. — 

 Clayey Jlelds. 



** Flowers all tubular. Scapes mamj -flowered. 

 2. T. Petasites, thyrsus ovato-oblong, leaves cordate unequally 

 toothed with the lobes approximate downy beneath, p. 243. — 

 Riversides. 



28. SENECIO. 

 Involucre subcylindrical, equal, scaly below ; the scales withered 

 at the tip. Receptacle naked. Pappus simple. 



* Florets all tubular. . 



1. S. t;?/Zgam, leaves semiamplexicaul pinnatifid toothed, flowers 

 in clustered corymbs destitute of a ray. p. 243. — IVaste ground. 



** Flowers rayed, with the ray rolled back. 



2. S. ifiscosiis., ray revolute, leaves pinnatifid and viscid, scales of 

 the involucre lax hairy, p. 243. — Hedge haJiks. 



3. S. lividus, "■ ray revolute, leaves amplexicaul lanceolate pin- 

 natifid and toothed, ovate scales of the involucre very short acute 

 not discoloured, "Sm. p. 243. — Hilly places, rare. 



4. S. sylvaticvs, ray revolute, leaves sessile ])innatifid lobed and 

 toothed, scales of the involucre very short glabrous^ stem erect 

 straight corymbose, p. 244. — Dry soils. 



•Xr-x* Flowers rayed, ivith the ray patent. Leaves pinnatijid. 



5. S.Jacol'cea,ra.yspre3.d\ng, leaves lyratebipinnatifid divaricated 

 toothed glabrous, .stem erect, pericarps hairy, p. 244. — Way- 

 sides. 



6. ii. aquaticus, ray sj)reading, leaves lyrate serrated glabrous, 

 the lowermost obovate and undivided, involucre hemispherical, 

 pericarps glabrous, p. 244. — fVet marshes, 



**** Flowers rayed. Leaves undivided. 



7. S. saracenicus, ray spreading, leaves lanceolate sharply ser- 

 rated nearly glabrous, corymbs of rather i^w flowers, p. 244. 

 ■ — Moist pastures. 



29. ASTER. 

 Involucre imbricated, its lowermost scales spreading (except iii 



