Kief powder is the accumulation of the luminous resin trichomes that form on the leaves and buds of marijuana. Trichomes are tiny, bulbous glands that protrude from the surface of the buds and leaves of late-stage cannabis plants. These trichomes can be removed from the plant material, producing kief, a powerfully concentrated form of cannabis. Jack Herer is a sativa-dominant cannabis strain that has gained as much renown as its namesake, the marijuana activist and author of The Emperor Wears No Clothes.