As many here have commented, the map is pretty bad and lots of these are not officially recognized as national flowers.
Having said that, actual national flowers, much like national animals, are often just whatever commonly grows in the country (assuming there is one flower that really sticks out).
They don’t have to be unique, because you’ll have a flag or a coat of arms for that purpose (which may portray that flower or animal, for what it’s worth). So, they’re rather just part of the “national branding”, if you will.
As many here have commented, the map is pretty bad and lots of these are not officially recognized as national flowers.
Having said that, actual national flowers, much like national animals, are often just whatever commonly grows in the country (assuming there is one flower that really sticks out).
They don’t have to be unique, because you’ll have a flag or a coat of arms for that purpose (which may portray that flower or animal, for what it’s worth). So, they’re rather just part of the “national branding”, if you will.