316 Class XIX. Order III. 



motely cut-serrate ; leafets of the outer calyx ciliate ; 

 ray entire ; seeds wedge form. Mick abr. 



Stem about two feet high, glabrous. Leaves glabrous, pinnace. 

 Leafets five or seven, distant, linear-lanceolate, ending in a long, 

 slender point, furnished with a few deep serratures or segments, 

 the larger ones pinnatitid. The branches and leaves are oppo- 

 site, the upper ones alternate. Flowers large, erect, yellow. 

 Outer calyx leaves about eight, oblong, rounded at the end and 

 fringed with setaceous teeth at the edge. Inner calyx leaves 

 oval-lanceolate, entire, yellowish and membranous. Florets of 

 the ray large, entire. Florets of the disc live toothed, yellow 

 with brownish anthers, and separated by scales longer than 

 themselves. On the east side ot Fresh pond. September. 



328. RUDBECKIA. 



RUDBECKIA LACINIATA. Willd. Common RudbecJcia, 



Lower leaves pinnate ; divisions three lobed, the up- 

 per ones ovate ; stem smooth ; down crenate. 



A tall plant, resembling the sunflower. Stem erect, round, 

 glabrous, six or eight feet high, branching. Leaves rough, the 

 lower ones petioled, pinnate or pinnatitid with about five lan- 

 ceolate, cut or toothed segments ; upper ones nearly sessile, 

 ovate or three cleft. Calyx mostly simple of about eight ovate, 

 acute segments. Florets of the ray large, yellow, lanceolate, 

 drooping. Disc conical, its florets greenish yellow, with their 

 short segments erect or incurved. Receptacle large, down pale- 

 aceous, crenate Wet meadows on the Newburyport turnpike. 

 August. Perennial. 



329. CENTAUREA. 



CENTAUREA NIGRA. L. Knapweed. 



Scales of the calyx ovate, with an erect, capillary 

 fringe ; lower leaves lyrate-angular, upper ones ovate. 



Stem about two feet high, branching, angular. Lower leaves 

 lyrate or irregularly toothed, upper ones entire. Flowers pur- 

 ple, solitary, terminal. Calyx round-ovate, the scales black, 

 ovate, with a stiff fringe. Florets all fertile. 



This plant, not long since introduced from Europe, has l-e- 



