Cannabis is a genus of flowering plants in the Cannabaceae family. – 1 

“Hemp” is a term used to classify varieties of Cannabis that contain 0.3% or less THC 

“Marijuana” is a term used to classify varieties of Cannabis that contain more than 0.3% THC 

While CBD is also an essential component of marijuana, it is derived directly from the hemp plant, which is a cousin of the marijuana plant. -2  

CBD is non-psychoactive yet has been demonstrated to possess medically useful properties. – 3

THC, the main ingredient in Marijuana and is responsible for the “high” of cannabis and can affect perception, mood, emotion, cognition, and motor function. -4

References:

1- https://plants.usda.gov/java/ClassificationServlet?source=display&classid=Cannabaceae

2- https://www.health.harvard.edu/blog/cannabidiol-cbd-what-we-know-and-what-we-dont-2018082414476

3- ElSohly MA, Mehmedic Z, Foster S, Gon C, Chandra S, Church JC. Changes in Cannabis Potency over the Last Two Decades (1995-2014) – Analysis of Current Data in the United States. Biol Psychiatry. 2016;79(7):613-619.doi:10.1016/j.biopsych.2016.01.004.

4- https://www.uclahealth.org/cannabis/cannabis-and-its-compounds