I actually think she DOES have pistils - but they're short and probably swallowed up by the trichs so they're not terribly visible. Being a sativa dominant, I think this is pretty normal - all of the sativa dominant strains I've grown have basically done the same thing... the only time I really knew there were pistils was at the very beginning of flower and then when it was close to harvest when I started to see little brown marks on the buds which, because I was worried about that coloring, a jewelers loupe told me they were really short, mature pistils....
In any event, I don't think there's anything to worry about here at all. It's the buds you're concerned with, the buds and the trichs are what you're going to be enjoying soon! Good luck!