My sons friend gave me some citrus fruit which she said are Key Limes. I used one today and they are not key limes so I hope someone can tell me what they are without a Photo. The biggest one she gave me is about the size of a small lemon and the smallest the size of a key lime. The outside looks like a lime, I cut it open and it looks and smells like an orange but it taste like a lemon, no sweetness at all. It is very tasty no bitterness. I'm going to try to grow it from seed and would love to know what to tell people when they ask what it is. I'll try to get a Photo later. Thank you all in advance!!!!