WHAT YOU NEED TO KNOW ABOUT MARIJUANA LEGALIZATION IN ILLINOIS WebMD A-to-Z Medical Marijuana FAQ What is marijuana? Marijuana refers to the dried leaves, flowers, stems, and seeds from the Cannabis sativa or Cannabis indicaplant. The plant contains the mind-altering chemical THC and other similar compounds. Extracts can also be made from the cannabis plant (see “Marijuana Extracts“). … Continue reading SS Council Marijuana Toolkit: