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; seeds shiny, smooth, 0.7-0.8 mm long
..2 Stems puberulent in 2 lines; leaf blades 1-veined; sepals 1-veined, glabrous; [native, OK and nw. LA westward]
....3 Fruiting calyx lobes papillate (at 40× magnification); capsule nearly straight-sided, nearly as wide near the top as at the base
....3 Fruiting calyx lobes not papillate (at 40× magnification); capsule ovoid, distinctly broader at the base