338 CLASS XIX ORDER III. 



segments, the larger ones pinnatifid. The branches and leaves 

 are opposite, tlie 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. Flo- 

 rets of the ray large, entire. Florets of the disc five toothed, 

 yellow with brownish anthers, and separated by scales longer 

 than themselves. — On the east side of Fresh pond. — September. 



Coreopsis rosea. Nutt. Red Coreopsis. 



Stems mostly simple; leaves linear, entire; pedun- 

 cles terminal; rays unequally three toothed; seeds 

 entire, naked. 



About a foot high, smooth, simple or slightly branched. Leaves 

 opposite, connate, with tufts of leaves or branchlets in the axils. 

 Flowers few, small, pale red, with a yellowish disc. — At Ply- 

 mouth. Mr. Russell. — August. 



354. RUDBECKIA. 



RuDBECKiA LACiNiATA. WUld. Commoii RudbecTcia. 



Lower leaves pinnate ; divisions three lobed, the 

 upper 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 pinnatifid 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 pa- 

 leaceous, crenate. — Wet meadows on the Newburyport turn- 

 pike. — August. — Perennial. 



355. CENTAUREA. 



Centaurea nigra. L. Knapweed. 



Scales of the calyx ovate, with an erect, capillary 



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



