Cannabis flowers or 'buds' are made up of the cola, (or apical bud) at the top of the plant, the calyx (small sugar leaves, tear-shaped nodules, and pistils ('hairs' that poke out of the calyx)). Flowers, when cultivated and harvested appear as a dense mass of cola, calyx, or both and are sold by gram. Smaller flower portions are sometimes called 'popcorn' and are sold at lower rates.