Aceriphyllum

Aceriphyllum rossii
A clumping perennial, native to moist woodlands from northern China to Korea. It is the sole species in this genus which is part of the Saxifrage family.
The deeply-lobed, maple-like leaves, up to 10 inches across, are glossy mid-green. They are borne atop stems about 9 inches tall.
White flowers, up to 0.3 inches wide, are borne on very large panicles, reaching up to 2 feet high, during early spring.
Hardy zones 6 to 8 in partial shade on moist, cool soil.