Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
..2 Leaves 2-5 (-8) mm wide; annual or biennial; inflorescence pubescent
..2 Leaves mostly (8-) 10-20 mm wide; perennial; inflorescence glabrous
....3 Petal blade 5-9 (-10) mm long, toothed
....3 Petal blade (8-) 12-18 mm long, fringed