Strawberries are pretty easy to identify. There's nothing that looks like a strawberry that is poisonous. There is only the wild/wood strawberry which has yellow flowers and red berries smaller than the usual strawberries. Still edible but not as much flavor. There are also strawberry varieties grown that have yellow or pink flowers. Taste will easily tell you the difference between wild strawberries and the ones we usually plant. Despite the fact we are barely past our last frostdate and I haven't planted any vegetables in the garden yet my strawberries have already bloomed and are starting to produce fruit.