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Key to Styphnolobium

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1 Flowers in terminal panicles; hairs of the petioles and inflorescence axes translucent or white; leaflets (9-) 13-19 per leaf; flowering Mar-May; [native; AR, LA, OK, TX]
1 Flowers in axillary racemes; hairs of the petioles and inflorescence axes translucent, white, golden, or brown; leaflets (7-) 11-17 per leaf; flowering Jun-Sep; [horticultural non-native]