"Chock-full of terpenoids, or aromatic compounds, that become especially concentrated during drought conditions"OK, Time, what did you mean, exactly? Context clues are key - the author wants the word "aromatic" to describe sense impact, or how these compounds taste and smell. Of course, when I think "aromatic compounds," I imagine cyclic molecules with lots of pi electrons, stabilized through conjugation.
Can't we both be right? Of course! Certain compounds fit both criteria - they have both an aromatic ring and also smell good. Then, of course, there's terpenoids that don't fit either rule. Most play to the middle: they're odiferous, but would still make Huckel cry himself to sleep.
Either way, a little context goes a long way to helping people understand the wide array of flavor compounds in their food...without causing chemistry consternation.
Update (8/9/12) - Fixed image, deleted THC, added thymol as a more representative volatile terpenoid