This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
This is the most common as well as variable of the genus. The plant is weak, and the branches spread, lying close to the ground or standing more erect. Corolla, greenish yellow, and berry yellow. Leaves, somewhat triangular in shape, deeply toothed, with hairy petioles. Plant, hairy, rank-scented.
One or two of these plants spring up in my garden on Long Island every year, and, if let alone, grow to great size, 3 or 4 feet in diameter. Where do they come from? They have never been planted, and the neighbors do not have them. In cultivated soil along the coast.