Sapling and Cycles

I have a question about using the Sapling Add-on with Cycles Renderer / Materials.

I know how to add a Texture to the leaves in BI, but how do I do it in Cycles?
My problem isn’t the transparancy, but I can’t figure out how to unwrap them correctly.

This is what I get:

I would be thankfull for any answers.

Generally I find that the produced sapling has pre unwrapped leaves?

… Okay, now I feel really stupid - it works!
Thank you zeealpal!!!

I have been fooling myself for months now, because I thought I had to unwrap the leaves…