COMPOSITiE. 87 



Stem 1 to 3 foot lii2:li, In-anclicd from about the middle, with 

 the branches more spreading and lont,'cr in propoi'tion than in 

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

 lower one with a mucl) larger terminal lobe. Anthodcs 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 somctinu^s with a very few hairs between 

 the shallow ridg(>s in S. aquaticus, even in the disk-florets, while in 

 S. Jacobtea the latter arc liairy. Leaves generally purple below. 



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

 common. 



Marsh Bagicort. 



Frencli, Senegon de CEau. German, Wctjsser Baldf/reis. 



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 length 

 reflexed. 



SPECIES VIIL— SEN E CIO S AR A C ENICU S. Linn. 



Plate DCCLVII. 



Reidh. 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. & 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. Anthodcs 

 numerous, erect. Pericline cylindric - hemispherical, puberulent ; 

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

 Ray -florets fi to 8. Achenes glal)rous. 



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 



