Good questions. Adventure sites are intended to be where something happens and are the entire hex. A location is inside of a hex, meaning an adventure site can have multiple locations in it. The naming convention is confusing and will be fixed in the next version.
Hex-flower reference isn't included at this time, so in the meantime you can fill as you move or fill the whole map before you play. I like having the whole map before I play as it makes creating narratives easier, especially with the amount of rolling needed to generate solo stories.