Little green balls on bottom of each pistil?

[Lowryder1]

Inside of the calyx is the unfertilized embryo. The pistols (hairs) are tubes that catch the pollen and transport it to the embryo. First grain of pollen wins the pollination race. Once pollinated, the pistols die and 5ish weeks later there's a viable seed.

Thanks.

If a calyx is pollinated, how long does it take for the pistil to die?

Because I'm now on 4 and half weeks flowering and some pistils are turning brown on the lower branches, hopefully not hermies...