The Glossophytes are a clade of land plants comprising the glossopterids and their descendants. This includes the Gnetales and angiosperms, as well as Bennettitales.
Their monophyly is rather well supported by molecular methods, although their internal relationships are somewhat more shaky.
The clade had diverged by the Permian, when glossopterids appear in the fossil record.
References
Glossophyte Wikipedia(Text) CC BY-SA