A query on Dracaena fragrans at the RHS Horticultural Database returns a number of entries, several of which are listed below: Dracaena fragrans 'Massangeana' Dracaena fragrans (Compacta Group) 'Compacta' Dracaena fragrans (Deremensis Group) 'Lemon Lime' The first is in a format that's typically encountered. The last two include a group designation. Is the group name, including the brackets, considered to be part of the plant's botanical name? Or is it there strictly for reference and is to be omitted in actual usage? I'm guessing the group name is partly due to D. deremensis being reclassified as D. fragrans.