This is harbinger-of-spring (Erigenia bulbosa). It is one of the first spring wildflowers to appear in the woods. This picture was taken at the Eunice Bryan Nature Preserve in Clinton County March 24, 2009. Only the Erigenia was flowering, no other spring wildflower was out yet. The spring beauty (Claytonia) leaves had started to appear but no flowers yet.

link to Erigenia bulbosa