+1 mili. My observation has been tenius has less number of those circuler ridges (center of which get PE) around the branches, than milis. If you see too many shallow ridges with lots of PE, then its a mili. Tenius tend to have 3-5 per full circle around the branch. This is super estoeric though, and I am not at all an sps expert, so take it with a grain of salt