310 CLASS XIX. ORDER I. 



* Cnicus glutinosus. Glutinoiis Thistle. 



C. folUis pumafijidls, laciniis divaricatis ; ccdyce 

 ovato, sqiiamis mtdicis, g-li((i/wsls. 



Leaves pinnatifid with divaricate segments ; calyx 

 ovate with unarmed ghitinous scales. 



Stem from four to six feet high, branching, more or less downy. 

 Leaves sessile, somewhat clasping, more or less downy, pinnati- 

 fid; the segments subdivided, divaricating spinous. Flowers 

 small, deep purple, on slender stalks or branches. Calyx ovate ; 

 the scales appressed, glutinous on the back, of a brownish color, 

 connected by a white web, so as to appear speckled, ending in a 

 short, softish point, which is longest in the uppermost. — In 

 damp, rich soils. — August, September. — Biennial. 



It is one of the handsomest of the genus. — Nearly allied to 

 Cirsium muticum of Michaux, but appears to differ in its leaves 

 and its ovate glutinous calyx. 



Cnicus iiorridulus. Yclloio Thistle. 



Leaves sessile, pinnatifid, acutely cut, thorny ; in- 

 volucre many leaved, one flowered. 



Stem fleshy, hollow, covered with long, fine wool. Leaves 

 clasping, pinnatifid, woolly and hairy, their lobes rather short, 

 ending in short rigid spines. Flowers large, axillary and termi- 

 nal, invested at base by an involucre of linear leafets, which are 

 edged with short, firm thorns. Calyx oblong, its scales loosely 

 erect, raucronated, ending in spines and connected by a web. 

 Florets yellowish white. Anthers reddish. — Low fields, &c. — 

 Biennial. 



Cnicus lanceolatus. Willd. Spear Thistle. 



Leaves decurrent, pinnatifid, hispid ; the segments 

 divaricate; calyx ovate, villous ; stem hairy, ^m. 

 Syn. Carduus lanceolatus. L. 



Very common by road sides and in waste ground, usually three 

 or four feet in height. Stem upright, furrowed, hairy, and winged 

 by the decurrent base of the leaves. Leaves white and woolly 



