Two new species of forget-me-nots, Myosotis chaffeyorum C.A.Lehnebach sp. nov. and Myosotis mooreana C.A.Lehnebach sp. nov. are described and illustrated. These species are endemic to New Zealand and restricted to the mountains of north-west Nelson (South Island). Both species are uncommon and M. mooreana is known from the type locality only. Their conservation status is rated as “Nationally Critical”. A table listing differences between these two new species and other similar species and an identification key are provided.