how can U tell what seeds are which?

[gin4dub]

I have thousands of seeds from smoke I bought and grow my plants from these...I cant afford to buy seeds...can anyone tell me how to tell or can I tell what kinds they are? People talk of ones called white widow, or purple haze...mine all look similar.. I have been able to grow some awesome weed from them, but would like to be able to pick certain strains if possible. They are all kept together in an old cigar tube. Any info will be greatly appreciated.

I know this doesn't tell you much boss, but from what I understand, the only way to know what kind of seeds you have short of genetic testing, is to grow them to maturity.