Christmas orchid is a name for various orchids, flowering around the time of Christmas or otherwise popular as a Christmas decoration:
Angraecum sesquipedale (Star of Bethlehem orchid) Calanthe triplicata – SE Asia, Australia, western Pacific Cattleya percivaliana (Percival's cattleya) Dendrobium cunninghamii (Winika) Cattleya trianae (May flower)