Sannantha crenulata, commonly known as fern-leaf baeckea,[2] is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to a restricted part of Victoria in Australia.

It is an erect shrub with egg-shaped to round leaves with scalloped edges, and groups of usually 3 white flowers arranged in leaf axils.

[2][3][4] This species was first formally described in 1855 by Ferdinand von Mueller who gave it the name Camphoromyrtus crenulata in his book Definitions of rare or hitherto undescribed Australian plants from specimens collected on "springs and rivulets of the Buffalo Ranges".

[7] Fern-leaf baeckea is only known from the lower parts of Mount Buffalo in north-eastern Victoria, where it grows on rocky streamsides in open forest and scrub.

The main threats to the species include weed invasion, inappropriate fire regimes, and road works.