Makes quite a lot of sense that a fictional world like the Realms would have different plant varieties than Earth, really. just consider how many varieties of a given plant we have here, often some have a niche usage. A different varieties not found on earth doesn't seem that far-fetched in a fantasy world.
Really, if you want to look it up, the Realms has a lot of really strange plants out there that are quite common in the setting. Duskwood and Blueleaf are two tree varieties native to the area we are adventuring in. Never seen them portrayed in a game though, lol. Maybe Larian will be the first...
