Obviously very minor as bugs go, more of an oversight.

The Flower Spreader T2 blueprint isn't listed in the blueprints screen.
You get it when either the terraforming hits 100MTi or when the biomass hits 100g (I should've posted right when it happened, didn't expect the numbers to soar the way they are).

no it's not a oversight you get it for hitting a certain goal of biomass (already unlocked it so i can't see how much) in which biomass research is shown in the biodome so it is visible just not on the main research tree.

You are absolutely correct. Thank you.
I was expecting each to come up in the blueprints screen and completely forgot about the one in the biodome.