Myosotis chaffeyorum is a species of flowering plant in the family Boraginaceae, endemic to the South Island of New Zealand. Carlos Lehnebach described the species in 2012. Plants of this species of forget-me-not are perennial with a creeping habit, bracteate inflorescences, and white corollas.

Carlos Adolfo Lehnebach is a New Zealand botanist. He is employed as a botany curator at the Museum of New Zealand Te Papa Tongarewa. Lehnebach has a master's degree and a PhD from Massey University.