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Key to Guaiacum

Zygophyllaceae

Guaiacum

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1 Leaflets 8-16; leaflets 2-3 mm wide; [TX in our region]
1 Leaflets 4-10; leaflets > 8 mm wide; [s. FL in our region].
  2 Leaflets 4 (-6); leaflets 25-35 mm wide; corolla puberulent; fruit with 2 carpels and 2 angles
  2 Leaflets 6-10; leaflets 8-15 mm wide; corolla glabrous; fruit with (4-) 5 carpels and (4-) 5 angles