Personally, those don't look like male flowers, just looks like a big swollen un-fertilized bract to me. Don't get too hastey and kill them yet, just pull it off and open it up, yellow pollen means flower, but all green and it looks normal to me. All my outdoor female plants had those on them, and I didn't get a single seed off 6 plants. And they were harvested at roughly 30% amber trichomes too, so they were definately fully mature.