1 | Plant perennial, with branched woody rootstock; phyllaries with narrow margins (up to 0.5 mm wide, usually less) |
1' | Plant annual, with taproot; phyllaries with broad margins (1-1.5 mm) wide |
2 | Scape bracteate; plant up to 43 cm tall; ligules 8-9 mm long |
2' | Scape ebracteate; plant small, usually less than 10 cm tall; ligules c. 15 mm long |