In which group of plants water is NOT required  for fertilization ?

Gymnosperms exhibit siphanogamy (formation of pollen tube). The pollen grain is released from the microsporangium. They are carried in air currents and come in contact with the opening of the ovules borne on megasporophylls. The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia.