Hartleya is a monotypic genus of flowering plants belonging to the family Stemonuraceae.

[1] The only species is Hartleya inopinata.

[2] The genus name of Hartleya is in honour of Thomas Gordon Hartley (1931–2016), an American botanist.

[3] The Latin specific epithet of inopinata refers to inopinatus meaning ‘unexpected’.

[4] It was first described and published in Blumea Vol.17 on page 218 in 1969.