Previously grown as Stipa tenuissima

Plants of the World online, Kew Science https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:281184-2 Link

This species has no known medicinal properties but related species have a narcotic effect on the spinal cord and brain.

Plants for a Future (2020) https://pfaf.org/user/Plant.aspx?LatinName=Nassella