[1] It was described by Carlos Lehenbach in 2012,[2][3] and is a synonym of Myosotis australis, a species of forget-me-not native to New Zealand, Australia and New Guinea.

Lehnebach and A. Zeller, and is housed at the herbarium of the Museum of New Zealand Te Papa Tongarewa (WELT SP092756/A).

[10] In general, within the southern hemisphere lineage, species relationships were not well resolved in that study.

[10] At the time of its description, M. mooreana was only known from the type locality and thought to be endemic to Kahurangi National Park, Western Nelson, in the northern South Island.

[2][1][3] Myosotis mooreana was listed as Threatened - Nationally Critical on the most recent assessment (2017–2018) under the New Zealand Threat Classification system for plants, with the qualifiers "DP" (Data Poor), "OL" (One Location) and "Sp" (Sparse).