Huperzia australiana is a species of small terrestrial plant, a firmoss, in the Lycopodiaceae (clubmoss) family.

The plant occurs at sheltered sites in subalpine and subantarctic regions, in grasslands and around bogs, up to 2000 m above sea level.

[1] Huperzia australiana has decumbent stems with densely tufted, erect branches up to 300 mm long, usually branched 2 or 3 times.

It reproduces vegetatively through the often numerous small bulbils which form along the stem.

The sporophylls are similar to the foliage leaves; no strobili are formed; the bright yellow, kidney-shaped sporangia are produced in the upper leaf axils.