Myosotidium hortensia is a large and impressive herbaceous plant from the Chatham Islands, New Zealand, reaching 24 in (60 cm) or more high. The flowers are pale to dark blue, up to 0.7 in (1.7 cm) in diameter.
Myosotidium hortensia has proved to be hardy in cultivation in the UK, with a recent report of it growing near a north-facing wall, in a garden in Derbyshire, at 600 ft (180 m) above sea level. It is also called Chatham Island forget-me-not. There is a white form in cultivation.