Ancistrachne maidenii is a grass (in the family Poaceae) endemic to New South Wales.

[4] It is a scrambling perennial grass with slender, rigid horizontal stems and branches which ascend.

The lower lemma (similar to the upper glume), has seven nerves and is sterile.

It flowers in summer, and grows on sandstone soils, north of Sydney.

[2][1] The specific epithet honours Joseph Maiden,[6] In New South Wales, this species is listed as "threatened".