Warm/cold blood?

[Taqwus]

Experimenting with C'tis Miasma Last night brought to mind one question -- should Vine Men and Vine Ogres be treated as warm-blooded (as they currently are) for the purposes of Miasma? It sounds odd to me that something consisting entirely of plants would be that way. *shrug*
(Not too many strategy games where "are my plant-men warm-blooded?" comes up, I'd suspect. Maybe a high-tech fantasy game where Rainbow Six is stalking Druid legions with infrared vision?)