I'll have to read your article more carefully. But having first tried pot more than 50 years ago, this always has been my understanding as well. I used to grow my own back in the day too, and believe me you only get high from the leaves and flower of the plant, and this also is what was said in the how-to-grow your own books. And you know the potency of a plant can vary. The commercial stuff they are selling now is much more potent than the mellow weed we smoked back in the day.

Ok, I did review your article more carefully and there is nothing in it that changes my understanding of the terminology.

In the 18th and 19th century, hemp was widely grown in the U.S. for industrial purposes like making rope, sails, fabrics and other products, and it was the stem that was used not the leaves or flower, which contain most the THC. I also believe, though I may be incorrect, that the stems have a significant amount of CBD, so that they were used to produce CBD which was legal while THC products were not.

So, ironically, to say they are the same is actually confusing the issue. Yes, you can say based on the scientific cataloguing of the name they are the same, but so far as their actual use and function, they differ.