[V's in a similar boat - their olfactory senses have been changed by their arrival in Revan, besides, so even if they could do a scan, the results themselves might not be as workable as normal.]

Something about this... doesn't seem right?

[If only because the plants smell. But, unlike certain predatory trees, they're not doing anything as far as V can sense.]

Or they have special traits - just not normally-quantifiable ones.

[Thus making them... annoying.]