Yes indeed the so advertised "lily trees" marketed by Breck's bulbs are OT lilums (cross hybrid between trumpet and oriental). They for the most part are very strong stemmed lilies, many reaching heights, when mature, of 6 feet or more.
Please do not lean your bike against them, like Brecks shows in one of their pictures. You may lose your "trees" that way.
They are beautiful hardy lilies, but "trees", they are not.