Is it a dandelion?

Coltsfoot

Actually, it isn't, but it's easy to confuse the two. Coltsfoot can be seen in bloom right now primarily along roadsides and in waste places. This introduced species gets its name from the shape of its leaves (which resemble...you guessed it...the shape of a colt's foot). However, the plant often blooms before the leaves are visible. In a week or two, the flowers will be gone, but the leaves, with their distinctive white undersides will grow, and grow, and grow. You can see them at High Point near the parking for campsites 39 and 40 (among other places).

The familiar dandelion, also an introduced species, has long, toothed leaves once thought to resemble the teeth of of a lion (dent de lion).