This list also says all parts of onion and garlic are toxic to rabbits-- as adequately demonstrated-- this is just not true... There are also a couple of varieties of colocasia esculenta, [elephant ear] that are good for feed, [but most are far too irritating to be safe] but all in all a very good list--
I do feel it is good to err on the side of caution when introducing any plant to our rabbits.
Some plants considered generally safe may contain substances that accumulate, [like lambsquarters grown in nitrogen rich soils, wild morning glory, or malva neglecta [cheese weed] ] so it is always a good idea to make sure the rabbits have something to move on to-- and don't feed very much of anything if it has been a week since giving greens-- as they will hungry for greens and may overeat something they would normally move away from when they have had enough.
--once long ago I had a good source of old french bread [from grocery chain store, I would feed some to the rabbits along with their hay and other feed-- one time i went a week without having any to feed , and then got a big load of it, -- with out thinking, I fed the normal big chunk to all of my rabbits,-- instead of nibbling on it throughout the night and finishing it the next day- they gobbled it all up in one evening-- the next morning a found about a dozen dead rabbits from bloat, and GI stasis--- what a drag that was...