The test file above is the second one that Kralyerg made for me. It doesn't have all of my plants in it - you will find more in megamod - but out of the two test files this one has the most variety.
There definitely won't be 150 different plants, at least not anytime soon. Most of them are just colour variations of the same plant. For example, 30 maples (3 different trunk/branch colours and 10 different leaf colours), 13 tulips, 8 wisterias, 4 willows. That's already over 50 with only 4 different plants. Many of them I haven't yet seen in game even as a test, so when they do get released it's possible that some of them won't be very nice. It's all guess work until you see them in the game.
I'm not a 3D modeller and as I said, these are all based on CC trees, so they aren't my 3D models. Kral is kindly putting it all together but it takes time.