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.
1 Leaves lanceolate to oblanceolate, (7-) 15-32 mm long, 2-8 (-14) mm wide; perennial, stems to 8 dm long
|1 Leaves ovate, 3-8 mm long, 1-4 mm wide; annual, stems to 3 dm long.|
|..2 Fruiting calyx lobes papillate (at 40× magnification); capsule nearly straight-sided, nearly as wide near the top as at the base|
|..2 Fruiting calyx lobes not papillate (at 40× magnification); capsule ovoid, distinctly broader at the base|