At first glance, this pretty species, native to European woodlands, could be mistaken for a buttercup, with its shiny, yellow, 5-petaled, cupped flowers that bloom in April. The species name ranunculoides is derived from the genus name for buttercup, Ranunculus. The 1-inch flowers barely rise above attractive, deeply-cut, three-lobed, toothed leaves. They slowly spread by rhizomes and are tolerant of dry clay soils, which will hasten their dormancy in late summer. You can see patches of these perennials in the Bulb Garden, where they make a nice filler between taller bulbs.