Pistils are classified as the reproductive organs (effectively in female crops anyways) that contain the ovaries in which seeds will acquire if fertilized. As buds experienced, trichome heads change milky white. They kind of seem like plastic. These white trichome heads show the highest degree of THC and CBD. Ventilation: https://weedmarihuana.eu/2023/05/28/when-to-harvest-marijuana-guide/