What are the different types of weed(the drug)?

white widow doesn't have cocaine in it, it's white cuz all the resin forms crystals. And purple haze isn't all that week, white widow is stronger, but i love purple haze, and it's still a hell of a lot better than the stuff i've been getting lately :( There are sooooo many different types of weed i can't pretend to know them all. And it's not like purple haze is the weakest and white widow is the strongest, and the rest are all in between them in some kinda order. It's nothing like that. there's no way i could explain all about the different strains on here, but there's a lot of good web sites about it.