Occasionally it is possible to compare the behaviour of the linguistic items under study in a single discourse type ( or " monogeneric " ) corpus with their behaviour in one of the large " heterogeneric " corpora which are commercially available, such as the " British National Corpus " or the " Bank of English " mentioned earlier.
32.
Under the APG II system this genus was placed alone in family "'Melanophyllaceae "', but with the rider that " [ s ] ome of the families are monogeneric and could possibly be merged when well-supported sister-group relationships have been established . " In 2004, such a relationship was established between " Melanophylla ", " Aralidium " and " Torricellia ", resulting in the transfer of the first two of these genera into Torricelliaceae.
33.
In the Cronquist system, it was placed in Cornaceae, but the APG II system give it its own family, "'Aralidiaceae "', with the proviso that " [ s ] ome of the families are monogeneric and could possibly be merged when well-supported sister-group relationships have been established . " Such a relationship was established between " Aralidium ", " Melanophylla " and " Torricellia " in 2004, resulting in the transfer of the first two of these genera into Torricelliaceae.
