CENTAUREA AMERICANA.
(SUB-GENUS PHRYGIA.)
AMERICAN CENTAUREA.
Syngenesia frustranea, Linn. Corymbiferse, Juss.
GENERIC CHARACTER.
Calix various. Mays 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 growing
thicker towards the calix ; calicine folioles oval, with a feather-form recurved
appendage. Nutt.
Root annual. Stem from four to six feet high, smooth, striated with
whitish-green lines. Leaves sessile, lanceolate above, broad-lanceolate
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