Both of these maples were grown from seed. Seed for the smaller-lobed leaf was collected in Nova Scotia on a roadside in the country in September of 2005. My notes say"maple-like seed but leaf is ovate, doubletoothed, serrate, long-tipped, light green, slightly whitened below, longer petiole, leaf about the size of a typical hawthorne". I did not note whether twigs were opposite but the seedlings (10 inches high) are holding to that characteristic. As I recall this was shrublike and only 6 to 8 feet tall. At least it was not a big tree. (The leaf picture may be presenting juvenile characteristics since the leaf is from a seedling.) Seed for the deeply-lobed leaf was probably collected from someone's garden or a park. This tree has red twigs (new-growth) and red petioles. It is growing quite quickly (faster than a silver maple) with small leaves and slender rather upright branches (looks shruuby).