Is the bonus seed a standard or feminised?
Have you touched those pistils with your fingers or anything else that could make them turn brown, if they think they have been pollinated, they go brown and return into the calyx or the calyx expands round the pistil to create the ovulation, insemination cant think of the correct word impregante etc you get what I mean.
Some strains can just do that too ?
Maybe someone that has grown that before maybe able to help, either way it looks densley populated with trichomes. Nice.