University of Hawaii Bromeliads

I visited this garden recently, and nothing was labeled.. what a display! Any ideas of what any of these are?

or these?

or?

or maybe this?

Some guesses...
The first two look a little like T. funckiana, but I'm not much of a Tillandsia expert.
The third looks like T. capitata (which comes in many forms)
The fourth might be the beautiful Orthophytum navioides.
Dave.