Marijuana is derived from a hemp plant that is called Cannabis Sativa. This plant is being grown indoors and outdoors all over the world.Marijuana looks like a flowery, leafy, or bud-like substance which can appear similar to tobacco, with the exception of the greenish color.his plant is being grown indoors and outdoors all over the world. Marijuana looks like a flowery, leafy, or bud-like substance which can appear similar to tobacco, with the exception of the greenish color.