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1 Decumbent herbs; flowers borne in terminal racemes; leaves 5-25 mm long × 1-4 mm wide; [s. KS south through OK and TX, and southwards and westwards; disjunct in GA and FL]
1 Erect shrubs; flowers borne solitary in leaf axils; leaves < 10 mm long × < 1 mm wide; [s. TX southwards]