When I think back to the cases I've seen, Dave, I suspect this doesn't happen during the submission phase. I think it happens after something is submitted. In a recent example, someone had submitted four photos and the system accepted them because they did have a botanical name attached. Before they were approved, however, the entry for that botanical name was deleted because it was a synonym. The photos consequently ended up without a Latin name, and if those photos had been approved, they would have ended up in a no-man's land.
So, I think the important thing is for the moderators to decline anything without a name attached, especially when we're working with more than one window and not refreshing often enough. If a page isn't reloaded, the proposed change might still appear to have a botanical name even after the entry has been deleted.
