I don't see any reason to limit your artist search to someone who specializes in floral realism. As long as the artist excels in realism then the floral aspect should come naturally. Still not sure where you are in our largest state (not including Alaska), but in Houston you've got Nate Beavers https://www.instagram.com/natebeavers/ and in Dallas you've got Liz Cook https://www.instagram.com/lizcooktattoo/?hl=en. Realism isn't my forte so I don't have any instant recollection for Austin, but Joey Ortega there did very flowers on my wife and daughter https://www.instagram.com/p/BKo9JIVBAcZ/?taken-by=oiseau_noir&hl=en.