Just because you're "green" doesn't mean you can't have strong opinions on other issues. I imagine the split between "left" and "right" greens is similar to the difference between "social liberal" and "right-liberal" parties. Some countries have no liberal party, some have one with two wings, and some have two.

By "conservative greens" do you mean a hunting/fishing/rural party, or an economic liberal green party?

Bush is a symptom, not the disease.