Whorled coreopsis

Description:

When I saw this plant two weeks ago, I thought these entire lanceolate leaves were whorled in sixes, but in fact it is divided leaves with 3 leaflets.. Flower head or disk was not open yet, so what appeared to be green leaves, sepals maybe, were ray flowers that became large and bright yellow a week later.

Habitat:

Dry forest edge.

Notes:

This is a good example of how an immature plant can mystify you - but then when it matures, it's quite familiar!