Green algae descendants possessing sporophyte generations that are by their parental gametophytes.

Emryophyte is basically a synonym for land plant, kingdom Plantae, or, indeed, simply plant.

Another perspective is that embryophytes are plants that simply have a sporophyte generation, which thus form from embryos, just as literally we form from embryos, with the additional criteria that these embryos are nourished by parental tissue (just as we literally were nourished by our parental tissues).