In triloba, the leaves usually have 3-5 shallow to medium lobes in the lower portion, with the upper part of the leaves remaining unlobed. In palmata, the leaves are so deeply lobed as to nearly reach the center vein. In the second picture you will notice an unlobed leaf, typical of triloba. In palmata all leaves are lobed. V. palmata tends to be rare in Ohio, but triloba is common here on dry oak hillsides.
For those out tromping the region in April, here's a few more species to look for. The Foamflower or False Miterwort, Tiarella cordifolia. It appears to bloom without leaves, but they branch off the base of the plant and are quite broad and fuzzy. This species can blanket the forest floor.
Mair-he-juana?? Hardly. This is Dentaria or Cardamine, depending on who you follow. The four petaled flower puts this in the Mustard family. Commonly known as Cut-leaved Toothwort, it is abundant in most woods.
Often found together with the above species, but overlooked because the flowers are similar, is the Large Toothwort. The leaves are in threes, but much broader.
Wood Betony, Pedicularis canadensis. I love how these flowers look like turkey heads. They range from yellow to maroon. They are sometimes mistaken for a close relative, Swamp Lousewort P. lanceolata. Its flowers are robust and the leaves are opposite. Wood Betony flowers look more deflated and the leaves are alternate.
This beautiful looking species is the Large Whorled Pogonia, Isotria verticillata, an orchid recognized by the whorled leaves, purple stem, and long purple sepals. From this angle it looks like a snake rearing back to strike. Don't mind me, I have an imagination. Chances of seeing it's relative, the Small Whorled Pogonia I. medeoloides, is unlikely. It is one of the most endangered orchids, and the only healthy population in Ohio is in a small area in Hocking County.