Marijuana, hashish (hash) and hash oil come from Cannabis sativa, or Cannabis indica, both are types of hemp plant.
Marijuana, to be smoked, is made from the dried leaves and flowering tops of the plant. Resin to make hash is collected from the flowers before they are mature. The resin can be dried to make hash.
Some common street names for it are: weed, skunk, herb, chronic, jay, bud, blunt, bomb, doobie, hydro, ‘dro, sinsemilla, hash, joint, pot, grass, reefer, Mary Jane (MJ), ganja, homegrown, dope, spliff, kush.
Cannabis contains at least 70 different cannabinoids. We usually refer to tetrahydrocannabinol or THC, a chemical that changes the way you think, feel and act, when we talk about the psychoactive actions of cannabis. There is another cannabinoid called cannabidiol or CBD present in varying quantities in different cannabis strains that we think helps balance some of the potentially dangerous side effects of cannabis use.