Ranunculus viridis, the Mount Allen buttercup, is a critically endangered species of alpine Ranunculus (buttercup), endemic to Rakiura/Stewart Island, New Zealand, where it occurs at altitudes of 700 metres (2,300 ft) on Mount Allen in the Tin Range.

[1] Department of Conservation surveys found a small number of plants in the early 2000s and again in March 2017.

The latest survey team collected two rosettes, which are being grown in a climate-controlled glasshouse at the Dunedin Botanic Garden.

[2][3] The Mount Allen buttercup is a short perennial herb with leaves forming small clumps or patches.

It survives in the shady damp crevices and ledges of rocky outcrops high on the mountainside at altitudes of 700 m (2,300 ft).