The weed plant anatomy includes small, pear-shaped leaves, otherwise known as bracts, which form the buds on the marijuana plant. Sometimes, bracts are called the seed pod, as they cover and protect the cannabis seed. You can find bracts between the sugar leaves. They are often green in color but may change colors and appear in different sizes and shapes. Bracts have many resin glands, which lend to them being one of the prime parts of a cannabis plant, specifically where the highest THC concentration is found in the entire marijuana plant.