I wrote that thread with the help of Hazel-Mom, and a number of rabbity websites.
The upshot of the whole thing is that there are SO many plants that rabbit owners and organizations (even ASPCA) disagree on toxicity.
Most pet lists are built with dogs and cats in consideration more so than rabbits.
The most definitive list of not-good-for-bunny plants was that at 3Bunnies Rescue (linked in the library thread).
As it is impossible to weed out whose info is accurate from all these resources, I went the opposite direction, and only posted those plants that are guaranteed to be safe.
Hope that clarifies our listing a bit.
Of course, you can always grow the herbs, vegetables and fruits listed in the library too, in addition to flowers and shrubs.