See: https://www.inaturalist.org/flags/544861. Dendrobium eburneum is accepted as a synonym of Dendrobium draconis. However, use on iNat is as an unpublished or illegitimate combination of Tropilis eburnea in Dendrobium. As both ALA and Powo accept that name as a synonym of Dendrobium aemulum, that is where I am putting the IDs.