Macrophotography Of The Trichomes Of Marijuana Plants. It Is In These Glands That The Cannabinoids Present In The Marijuana Plant Are Found. The Best Known Cannabinoids Are THC & X28 Delta-9-tetrahydrocannabinol& X29 And CBD & X28 Cannabidiol& X29 , Substances That Have Already Proven Their Medicinal And Therapeutic Qualities. Photo