Does perception work for herbalism?

Question in the title.
Following that, it says it spot rare reagent. What are rare reagent?

I ask those questions because I’ve had around 20% perception on “irradiated” and “altered” herbs, but still haven’t seen a proc of perception on those rare reagents. Nor anywhere else for that matter.

I’ve had a lot of bugs in this expac, from the weekly not resetting, unusable treatise and all that jazz. So I wonder if there is not a bug on this too.

Perception helps with all gathering skills (herbalism, mining and fishing).

It will tell you when your perception has allowed you to find “more” while gathering.
It won’t tell you exactly what was yielded from that, it’s all one lump pull still.
It increases the overall yield of the basic reagent plus a chance at a “rare” reagent which would be different depending on what you’re actually farming and your specializations in talents.

In general a herb node can pull a Null Lotus as a rare reagent and an ore node (without talents into it) will pull partial Null Stones. If it’s a “special vein” it will pull a certain reagent out of it as a rare reagent on top of that. Example: an irradiated herb will give you a chance to pull leyline residue.

I have a lot of perception stacked while farming.
You can get it from talents, equipment, enchantments for equipment, phials and food if you’re a cook.