I'd like to try to identify the maple street trees around my block. 1. I think this tree is one Ron B identified as Acer saccharinum, Silver Maple. I'm including this for comparison with what comes next. Note the deeply lobed leaves. There are some coloured leaves on the ground, but the tree is essentially still green. 2. I posted this tree in the photos forum as Acer saccharinum, Silver Maple, but Ron B thought it might be A. x freemanii, Freeman maple (not sure I have the botanical name correctly written). Ron pointed out that the leaves are not nearly as deeply lobed as the tree above. The leaves on the tree are almost entirely still green. 3. If it weren't for tree #2, just knowing there's a hybrid between red maple and silver maple (Freeman Maple), I'd have guessed this was it, as the leaves look like red maple leaves to me in shape, and like Silver maple leaves from the underside, but they've turned yellow, not red. But the leaves don't look anything like those on tree #2, so I don't know what it is. Short petioles. [Edited Oct 20]Here are a couple more photos. From right there on the street, the leaves on the tree and the ground look very yellow, but from a distance, the tree looks more orange. 4. From the long petioles, I think this is Acer platanoides, Norway Maple. But the leaf shape and the bark don't seem right, so I wondered if it was Sugar Maple. I think the petioles are too long though. It's looking quite yellow now. 5. This one is a total mystery to me. The only one in my book that shows such jagged leaf edges is Acer glabrum, Douglas Maple, but I don't know that tree at all. It hasn't turned colour yet. Some petioles short, some long. [Edited Oct 20]Michael asked for better photos. I got a lot of truly terrible photos, but here's what I can post. 6. Just confirming - this is Acer pseudoplatanus, Sycamore Maple? These are just starting to turn, sort of brown. Within two blocks, there are also street tree Acer cappadocicum, A. macrophyllum, A. rufinerve, and A. negundo, and newly planted A. griseum and A. platanoides 'Princeton Gold'. A pretty good collection for learning about maples.