Germinating seeds of the hemp or marijuana plant (Cannabis sativa). Marijuana contains THC (delta 9 tetrahydrocannabinol), a psychoactive compound. The Cannabis plant is native to central Asia. It is cultivated for three products: fibre from the stems, seed oil, and for use as a drug. This fast-growing annual plant is a common weed in northern India. The drug is produced in minute resin glands on the plant surface, including the leaves, but is most concentrated in female flowers.