Myosotis matthewsii is a species of flowering plant in the family Boraginaceae, endemic to the North Island of New Zealand.

[4] The type specimen of Myosotis matthewsii is lodged at the Museum of New Zealand Te Papa Tongarewa, Wellington (herbarium WELT).

[5][4] The specific epithet, matthewsii, is named after Richard Henry Matthews (1835–1912),[6] a Kaitaia resident who made the first collections.

Each rosette has 3–6 sprawling, creeping, subascending, unbranched to thrice-branched bracteate inflorescences that are 176–420 mm long.

[4] Myosotis matthewsii is endemic to the North Island of New Zealand in the Warawara Forest in Northland, from 65 to 300 m ASL.