This is a Mayapple leaf. Most posts of Podophyllum peltatum are of the flowers, my previous post included, but the leaves are interesting, too.
From Missouri Botanical Garden:
“Podophyllum peltatum, commonly called mayapple, is a rhizomatous, native Missouri wildflower that occurs in both moist and dry woodland areas throughout the State. From a single stem, each plant grows 12-18" tall and features one or two, deeply-divided, palmately-lobed, umbrella-like, pale green leaves (to 12" diameter). Plants with only one leaf will not flower. From the crotch (leaf axil) on two-leafed plants, a single, nodding, waxy, 6-9-petaled, white flower (3" diameter) appears on a short, thin stem in early spring. Flowers are quite showy, but usually hidden by the umbrella-like leaves. Each flower gives way to an edible, fleshy, greenish fruit (mayapple) which turn golden when ripe and may be used to make preserves and jellies. Leaves and roots are poisonous, however.
“Genus name comes from the Greek words pous or podos meaning a foot and phyllon meaning a leaf with reference to the shape of the leaf in the American species P. peltatum.
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