To quibble a bit here, the first two don't really exist as separate classes? . . .
I never claimed they exist as separate classes. I simply proposed a general distinction – i.e., something a customer might say when approaching the counter of a dispensary.
When I fill the bowl of my Fury (to get back to the topic), I fill it with cannabis.
Some of that cannabis is predominately high in THC. I call that "THC flower."
Some other types of cannabis that I put into my Fury are predominately high in CBD. I call that "CBD flower."
Some other cannabis that I put in my Fury contains significant levels of both THC and CBD. I call that "THC/CBD flower."
Whenever I want to weave myself a doormat or an itchy socks and underwear ensemble, I use industrial hemp.
And then I fire up my Fury (both to get back to the topic and to help me become one with the itchiness).