OBSERVATIONS OF POLLINATION IN THE PIGEON ORCHID, DENDROBIUM CRUMENATUM SWARTZ (ORCHIDACEAE) IN SINGAPORE

As the flowers of the pigeon orchid, Dendrobium crumenatum, bloom for just one day, this presents only a narrow window of opportunity for pollination to be carried out. We report observations of bees (Apis cerana) performing this important duty on the morning of its full blossom, and subsequently estimate the relative success of pollination by the floral visitors.