Hello - I have attached two photos from a mature (I think), serrated or serrulated (not sure), seven-lobed maple tree approximately 30 feet tall (rough estimate). The samaras hang down below the leaves and start out green and then turn green and pinkish-red in the summer. I have been pouring over textbooks on Maple trees of the World, but cannot find one exactly like the one in the photos. The leaves look to me like an Acer linganense from one of the books, but that seems to be very rare. At first I was looking at the Acer robustum and Acer campbellii, but those do not seem right either. Someone working for my real estate agent said that they were "Chinese Maple" trees. Any assistance would be appreciated.