COMPOSITE. 87 



stem 1 to 3 feet high, hranched from ahout the middle, with 

 the branches more spreading and longer in proportion than in 

 S. Jacohaea ; the leaves less deeply divided, less undulated, and the 

 lower one with a much larger terminal lobe, xlnthodes fewer, in a 

 much more lax and irregular corymb, larger, 1 to 1^ inch across ; 

 but the most striking difference between the two species is that the 

 achenes are glabrous, or sometimes with a very few hairs between 

 the shallow ridges in S. aquations, even in the disk-florets, while in 

 S. Jacobsea the latter are hairy. Leaves generally purple below. 



A form between the extremes of vars. a and 3 is the most 

 common. 



Marsh B^agwort. 



French, Seneqcm cle VEau. German, Wasser Baldgreis. 



Section IV.— DORI^. Reich. 



Perennial. Stem rigid, erect, fastigiato-corymbosely branched 

 at the apex. Leaves firm, elliptical or oval, undivided, toothed. 

 Outer phyllaries much shorter than the inner ones. Ligulate 

 florets of the ray few, elongate, flat and spreading, at leugth 

 reflexed. 



SPECIES VIII.— S ENECIO SARACENICUS. Lhm. 



Plate DCCLVII. 



Rdch. Ic. Fl. Germ, et Helv. Vol. XVI. Tab. CMLXX. 

 Billot, Fl. Gall, et Germ. Exsicc. No. 1014. 



S. salicetorum, Godr. Fl. de Lorr. Vol. II. p. 11. Gr. k Godr. Fl. de Fr. Vol. II. 

 p. 120. 



Rootstock creeping, with elongated stolons. Stem erect, gla- 

 brous, simple, except at the extreme apex, where it is corymbosely 

 branched. Leaves firm, sessile, elliptical or oblong - elliptical, 

 sub - semi- amplexicaul ; lowest ones oblanceolate - elliptical, sub- 

 petiolate ; all finely and irregularly serrate with incurved teeth, 

 glabrous or nearly so on both sides. Corymbs solitary, or several 

 combined into a rather irregular compound corymb. Anthodes 

 numerous, erect. Pericline cylindric - hemispherical, puberulent ; 

 outer phyllaries 4 to 6, two-thirds the length of the inner, linear. 

 Ray -florets 6 to 8. Achenes glabrous. 



By the sides of streams. Local. It occurs in Somerset, Wilts, 

 Stafford, Denbigh, Cheshire, Derby, York, Lancashire, Westmore- 

 land, Cumberland, and Northumberland ; and in most of the Scotch 



