The plants that are commonly referred to as geraniums, the ones with large pink, red, or white blossoms, are actually pelargoniums. I believe the "wild" geraniums you mention are actually cranesbill geraniums. There are lots of varieties of cranesbills. They have, lots of small two-inch single flowers and come in white, purple, blue, pink, and magenta. They grow fast, have a long bloom time, and do well in shady conditions.