2. Materials and methods2.1. Orchid seedsFlowers of D. lindleyi plants grown in a private orchid nursery atMuang District, Chiang Rai were hand-pollinated in March 2014. Fourundehisced mature capsules were harvested on 12 October 2014 andseeds were removed from the capsules on 17 October 2014. All seedswere kept in silica-gel desiccated tubes at 4 °C until use. Seedsof D. fimbriatum were removed from twenty naturally pollinatedmature capsules using aseptic technique in April 2013, and seeds ofD. findlayanum were removed from two naturally pollinated maturedehisced capsules on 14 June 2013.