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1 Corolla pubescent on its outer surface; leaf segments lanceolate, 1-2 mm wide; stem pubescent; seeds 3-4-winged (S. pectinata) or wingless (S. bipinnatisecta).
..2 Seeds wingless; filaments of anthers glabrous near the anther; anthers dehiscing 1/2 or more of their lengths; [Edwards Plateau, TX, and immediate vicinity]
..2 Seeds 3-4-winged; filaments of anthers woolly near the anther; anthers dehiscing 1/4 or less of their lengths; [LA eastwards, mainly Coastal Plain]
....3 Pubescence of stem long, reflexed; pedicels 6-7 mm long; capsule densely glandular-puberulent; seeds 1.0-1.2 mm long; [se. NC south to c. peninsular FL, west to s. MS]
....3 Pubescence of stem short, ascending; pedicels 7-10 mm long; capsule sparsely glandular-pubescent to nearly glabrous; seeds 1.2-1.4 mm long; [n. FL south to s. FL]