Drosera peltata has hairy sepals around the flower buds and cupping the flowers. Drosera auriculata has hairless sepals, sometimes fringed round the edge.
Drosera hookeri was described after this sighting was uploaded. Nearly all sightings previously included in Drosera peltata will now be Drosera hookeri. The easiest diagnostic is that hookeri stays green while the basal leaves of peltata turn red. Hookeri is also more robust than peltata and the stems can branch. Peltata has unbranched stems.