Stipa avenacea - renamed Piptochaetium avenaceum, and commonly called black oat grass, blackseed needle grass or blackseed speargrass, is a perennial bunchgrass native to Eastern North America. It is a member of the grass family Poaceae.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0