Like a larger version of the Celandine, this bright yellow poppy blooms at the same time, but is easily distinguished by its larger flowers with overlapping petals and bright orange stamens. They bloom for several weeks from late April into mid-May.
Gray describes the genus and the species:
STYLOPHORUM Nutt. CELANDINE POPPY. Sepals 2, hairy.
Petals 4. Style distinct, columnar; stigma 2-4-lobed.
Pods bristly, 2-4-valved to the base. Seeds
conspicuously crested. — Perennial low herbs, with
stems naked below and oppositely 2-leaved, or
sometimes 1-3-leaved, and umbellately 1-few-flowered
at the summit; the flower-buds and the pods nodding.
Leaves pinnately parted or divided. Juice yellow.
(Fromstylos, style, and pherein, to bear, one of the
distinctive characters.)
S. diphyllum (Michx.) Nutt. Leaves pale
beneath, smoothish, deeply pinnatifid into бог 7
oblong sinuate-lobed divisions, and the root-leaves
often with a pair of small distinct leaflets;
peduncles equaling the petioles; flower deep yellow (5
cm. broad); stigmas 3 or 4; pod ovoid. —Damp woods, w.
Pa. to Wisc., “Mo.,” and Tenn. May. —Foliage and
flower resembling Celandine.