[2] The genus as currently conceived is entirely endemic to Australia.

A few species native to other places were formerly included, but they have been moved to other genera.

[1][3] The following species are accepted as of 2021:[4] Over 70 other names have been published using the name Leptocarpus, but they have been transferred to other genera, including the following: In 1820, the name Leptocarpus was applied to some plants in the Verbenaceae.

Thus was created an illegitimate homonym.

One species name was included in the illegitimate genus, i.e.: