Is there some kind of list compilation of grass, tree, landscape detailing mods?

You need a more detailed landsape? this is Morrowind. It's about as detailed as needed. I don't believe there are any landscape detailing mods, for this very reason.

But, you're in luck when it comes to trees and grass. http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7762 (Needs MGE to be aniamted). http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=8334. http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=8190. http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=8490.

Vurts work is really optional. You may not like the changes, as they are quite radical.

I'm working on something you might like, though it's not near completion... I'd recommend vurts replacers though

Is there a compilation of all his works or do I need to hunt through threads to try to find each individually?

Don't forget Muspila's http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=8353

Go to PES and search "vurt" Some mods have already been linked for you above.
Or go to his profile here and look at Topics Started if you want to find the threads.

K thanks!