The point of this topic, as some of you are failing to realize...

Superior Alchemy recognizes the highest Item Rank as the 1st base, regardless of the order it's placed in the compound. Primary Alchemy ignores Item Rank in that sense, and recognizes each base material in the order it's placed into the compound.

Grass Hat (R24 Grass) + Black Jade (R25 Jade) + Alchemy Book 3 = King's Gown (R28 Grass/Flower)

Grass Hat being of lower Item Rank will only be recognized as the base material in Primary Alchemy, which means this compound will only successfully work in Primary Alchemy. The point of this topic is that Black Jade is Jade base, not Flower base. So according to King's Gown base materials, this compound should not work because the 2nd base does not match. @TheWind's screenshots prove that this compound does work.