Email Groups?

Am I missing something here?

I have email groups set up in Address Book. When using Mail on my Mac, I choose a group and the email is addressed to everyone in the group.

On my iPhone, when I choose a group, I'm taken to a listing of people in the group. I then have to add each person to the distribution one at a time

Please tell me I'm just blind and missed an obvious way to do this. I can't imagine such a BASIC feature being left out.