Flower (or bud) is the part of a marijuana plant that contains all of the cannabinoids.  Most commonly, it is ground and smoked.  Only female plants produce flowers in the ‘bloom’ stage, which usually takes 6 to 8 weeks.  The crystals visible on the tops of the flower are called Trichomes.  They are a rich source of THC and are an indicator of how potent the cannabis will be.  Trichomes can change their color and size depending on the strain and stage of their growing cycle.  They care used to indicate when a plant is fully mature and ready for harvest.  Organic aromas found in the oils of flowering plants are called Terpenes.  These oils have their own benefits and makeup that have an increased effect when ingested.