Iron Branch and Ironwood Branch can't be placed inside the fountain areas and inside Rosan' spit, like Observer and Sentry Ward can't be.

The Mango Tree can currently be placed in those places. And unlike the other trees, this one provides flying vision. It's basically a ward that works in Roshan's pit.

ALSO: Iron Branch/Ironwood Tree are a bit misleading with the cursor. They appear like they can be placed in restricted areas. It should be like the wards.