[Rygar]

Just in case, posting additional evidence found:
https://web.archive.org/web/20010822...ve/arc29.shtml

Defoliation - Necro Spell & Plane of Growth

Well, in the case of discussing what are and are not plants, there are two things to consider. The first is, could it be seen as a plant by some use of the word plant (as the discussion about fungi does), and also whether or not it’s a good idea for the game to consider such things plants.

Obviously if a treant is a plant on Norrath, it’s probably still a plant on the Plain of Growth. But we also have to consider the gameplay repercussions of allowing them to be considered plants on that plane. It’s easy enough to justify not having Defoliation work on them from a roleplaying standpoint (they are at the heart of Tunare, and are therefore more than mere plants). The question there is, would allowing that spell to work on them be too much from a gameplay standpoint? I don’t know the answer to that. I’ll ask.

As for fungus… I hear that some fungus are affected by defoliation and some are not. We’ll probably look into that.