What would you think of a grass/dragon line that starts as a wisteria, then evolves into a anthropomorphized snapdragon, and its final stage is a titan arum? I even came up with names: Mysteria, Dragunia, and Titatunia. It could be the first non-poison type to have stench as an ability. Grass type seal of approval?
Sounds reasonable to me; probably some good reasons to do over-the-top grotesqueness that might be fun, and lets you do a traditional support-oriented Grass-type with a twist. So sure.