Here are two trees in Stanley Park in Vancouver that have so many red samaras that they look like red-flowering trees from some small distance. The first is an Acer palmatum of some sort. Leaves are around 7cm in length and width. And here is an Acer pseudoplatanus. This species very common around here, but I needed help on this one, which looks so different from sycamore maples I've seen that I was sure it was a new tree to me. Well, the habit is certainly different - has it been coppiced? And the samaras are so small, but I suppose it's early in the season and they just haven't grown to size yet.