Hemp is the plant called `cannabis sativa.' There are other plants known as hemp, but cannabis hemp is the most useful. There are a myriad of uses for hemp, especially in clothing. Cannabis Sativa means useful (sativa) hemp (cannabis)'. `Hemp' is any durable plant that has been used in the past for constructive means. Fibre is what makes up the plant, and the word `hemp' can mean the rope or twine which is produced from the hemp plant. The stalk is also known as hemp.