& Tate Micromyrtus helmsii is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to inland areas of Australia.

It is a slender, erect or spreading shrub with overlapping, decussate, oblong leaves, and flowers with about 7 stamens, arranged singly in leaf axils.

The flowers are arranged singly in leaf axils on a peduncle up to 1.5 mm (0.059 in) long.

[2][3] This species was first formally described in 1896 by Ferdinand von Mueller and Ralph Tate, who gave it the name Thriptomene helmsii in Transactions, proceedings and report, Royal Society of South Australia from specimens collected in the Great Victoria Desert.

[2][3] This species of micromyrtus is listed as "Priority One" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,[3] meaning that it is known from only one or a few locations which are potentially at risk.