I have got a seedling of silver maple (a. saccharinum) with its leafes attached alternate. As you know silver maple like most maples use to have them opposite. Also its cotyledons is strange. The two of them are connected side by side to form a singel, broad leaf with a split tip. It seems like this seedling and another was born from one single samara. Usually these contain only one seed, don't they? I guess this is some kind of mutation. Have any of you heard of this happening to a maple before?