@BowsacNoodle @help_helper And I think rye is more common in North Europe/Scandinavia, the rest of Europe have wheat.
In that perspective I started to check the name in another European countries.
Sweden: Blåklint - Blue ???? (could not find translation to klint) Denmark: Kornblomst - Grainflower Norway: Kornblom - Grainflower Island: Garðakornblóm - Yard grain flower Estonia: Rukkilill - Ryeflower Germany: Kornblume - Grainflower Hungary: Búzavirág - Wheatflower
I think we can see the pattern here, grain.