Dragon’s blood rattans (Daemonorops spp.) or locally known as jernang, is one of the well-anticipated and economically valuable nontimber forest products from Sumatra. The species group produces a red resin on the fruit scale and is one of the main resources of some medicines and coloring. The characteristic of pollen morphology was one of important role in determining the pollination system of dioecious species such as dragon’s blood rattans. The purpose of this study was to examine the pollen characteristic and its relation to the pollination system of four species of dragon’s blood rattans from Sumatra, i.e. Daemonorops aff. propinqua Becc., D. propinqua Becc., D. draconcella Becc. and D. didymophylla Becc. Pollen of dragon’s blood rattans was collected from the secondary forest of Jambi and Bukit Dua Belas National Park, then stored in FAA solution, followed by observation using SEM (Scanning Electron Microscope). The pollen of Daemonorops aff. propinqua and D. propinqua have aperture and irregular ex-ornamentation types, while D. draconcella is monotonous and D. didymophylla is tricolors. The pollen of Daemonorops aff. propinqua and D. propinqua show uneven exines while the others Daemonorops have even exines. Characters of smooth pollen grains D. draconcella and D. didymophylla are indicated that those species are associated with wind pollination, whereas sculptured pollen grains in Daemonorops aff. propinqua and D. propinqua are associated with insect pollination.
