Marijuana THC Things You Need  To Know The Marijuana THC is also referred as Tetrahydrcocannabinol, and its other name is delta – 9. There are more than 80 chemical compounds that are present in the cannabis, and this plant is considered as one of the rich source of the psychoactive ingredient. In the flower, glandular trichomes, and leaves of the marijuana the THC is present in the rich quantity. The quantity of THC is higher in the female marijuana THC plants. This is one of the ...