CENTAUREA AMERICANA. 



(SUB-GENUS PHRYGIA.) 

 AMERICAN CENTAUREA. 



Syngenesia frustranea, Linn. Corymbiferx y Juss. 



GENERIC CHARACTER. 



Calix various. Rays funnel-form, irregular. Receptacle bristly. Pappus simple, 

 often pilose. 



SPECIFIC CHARACTER. 



Annual ; stem tall, slightly branched, furrowed ; leaves sessile, the lower ones oblong- 

 ovate, repand-denticulate, the upper ones lanceolate, acute ; peduncles grow- 

 ing thicker towards the calix ; calicine folioles oval, with a feather-form re- 

 curved appendage. Nutt. 



Root annual. Stem from four to six feet high, smooth, striated with 

 whitish-green lines. Leaves sessile, lanceolate above, broad-lanceolate 



