Synonym:  Prenanthes trifoliolata  Cassini  (Fernald)

              

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Perennials.  Taprooted.  Stems are mostly glabrous.  The sap is milky white.  Typical height is 3 to 5 feet.

Overall inflorescences are panicle-like, often tall and narrow, the branches ascending.  Flower heads are distributed singly or in small clusters along branches.

Flower heads are ligulate, borne on short peduncles, drooping in flower.  Florets number 8 to 13 per head, the corollas are pale yellowish, varying to nearly white.  Involucral bracts are glabrous, green, in two series, the inner series of equal length bracts; and the outer series also green, but much shorter.

The pappus is of minutely barbed bristles, pale yellow.

Lower stem leaves are often present at flowering.  Leaves are mostly glabrous or with a few hairs, varying in shape from broadly ovate to lanceolate (uppermost), sometimes with heart-shaped bases (lowermost).  Lower to mid-stem leaves are borne on long petioles and are 3-lobed or divided; the two lateral lobes tending to be narrow; and the sinuses tending to be acute-angled closest to the midvein.

Plants of woodlands, clearings, cliffs and thickets.  Flowers mid-August through September.  Native.

 

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Similar species:  N. albus, N. altissimus.

 

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