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1 Corolla lobes green to creamy white, 2-3 (-5.2) mm long, ascending or erect, oblong to ovate or lance-ovate, acuminate or rounded-mucronate at the apex; flowering in summer or fall (Jul-Oct).
..2 Mid-cauline scale leaves opposite; corolla lobes rounded at the apex, abruptly narrowed to a mucro, their margins erose (uncommonly entire); anthers 0.5-1.1 mm long; style slender with stigmas connivent; capsule dehiscing medially
..2 Mid-cauline scale leaves alternate; corolla lobes acuminate at the apex, their margins entire; anthers 0.3-0.5 mm long; style stout with stigmas spreading; capsule dehiscing from the apex.
....3 Plants relatively short (avg. 14.3 cm); stems usually purple and often stout; calyx sinuses frequently rounded; stamens frequently purplish