Chionochloa antarctica (common name - snow tussock) is a species of grass, endemic to the Auckland and Campbell Islands.
It flowers from October to December and fruits from November to March.
In both 2009 and 2012 it was deemed to be "At Risk - Naturally Uncommon" under the New Zealand Threat Classification System, and this New Zealand classification was reaffirmed in 2018 (due to its restricted range).