Trichomes are crystalized glands that produce resin on a marijuana plant. Often referred to as “sticky little hairs”, these glands are not actually hairs or crystals (although they’re still very beautiful close-up). Instead, they’re specific parts of the plant that carry the majority of cannabinoids (THC, CBD, etc.) and cover the plants major surfaces. Under a microscope, trichomes look like mini mushrooms, with each section providing certain value to the plant.