Micromyrtus triptycha is a species of flowering plant in the family Myrtaceae and is endemic to the south-west of Western Australia.

It is an erect, open shrub with narrowly egg-shaped leaves with the narrower end towards the base, and yellow, white or cream-coloured flowers with 10 stamens.

[2][3] Micromyrtus triptycha was first formally described in 2006 by Barbara Lynette Rye in the journal Nuytsia from specimens collected by John Green 25.4 km (15.8 mi) east of Lake Grace in 1975.

[2] Micromyrtus triptycha grows on sand plains, hills, slopes and disturbed areas between Harrismith, Hyden and Lake King in the Avon Wheatbelt, Coolgardie and Mallee bioregions in the south-west of Western Australia.

[2][3] This species of micromyrtus is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.