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Key to Leavenworthia

Brassicaceae

Leavenworthia

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1 Petals entire, white, < 7 mm long; leaf lobes deeply dentate, the terminal lobe only slightly larger than the larger lateral lobes
1 Petals deeply to shallowly emarginate (notched at the tip), yellow, white, or lavender, 7-15 mm long; leaf lobes entire to shallowly dentate, the terminal lobe markedly larger than the largest lateral lobes.
  2 Siliques conspicuously torulose (constricted between the seeds), even when young; seed wings absent or < 0.1 mm wide
  2 Siliques not torulose (constricted between the seeds) (or slightly so in L. stylosa); seed wings 0.2-0.5 mm wide.
    3 Petals 7-10 mm long, shallowly emarginate; styles 0.7-3 mm long; siliques flattened in the plane of the replum; [AL, GA, KY, OK, TN, or TX].
      4 Fruits margined; styles (1.5-) 2-3 mm long; [OK and TX].
        5 Leaf blade terminal lobes equal to or slightly longer than wide, margins usually shallowly dentate; petals pale yellow, obcordate to broadly obovate; [OK (Choctaw and McCurtain counties)]
        5 Leaf blade terminal lobes shorter than wide, margins slightly lobed or shallowly dentate; petals bright yellow, narrowly obovate; [TX (San Augustine County)]
      4 Fruits not margined; styles 0.7-1.7 (-2.2) mm long; [AL, nw. GA, KY, TN]
          6 Petals white to pale lavender; [KY, TN, and nw. GA].
             7 Styles 1-2 mm long; sepals pale lavender; [TN and nw. GA]
    3 Petals 10-16 mm long, deeply emarginate; styles 2.5-7 mm long; siliques thick (terete or subterete) or flattened in the plane of the replum; [AL and TN].
               8 Siliques thin, flat; styles 1.5-5.5 mm long; petals white to lavender; [n. AL].
                 9 Styles 2-5.5 mm long; mature siliques cuneate at the base and acute at the tip; [AL (Colbert, Franklin, and Lawrence counties)]
                 9 Styles 1.5-2 (-3) mm long; mature siliques rounded at the base and at the tip; [AL (Morgan County)]
               8 Siliques thick, fleshy; styles 2.5-7 mm long; petals yellow, white, or lavender; [n. AL and c. TN].
                   10 Siliques 12-15 mm long, 3-4 mm wide; seeds slightly elongate, cleft at one side of the long axis; [TN (Sumner, Smith, Wilson, Davidson, Rutherford, Bedford, and Maury counties)]
                   10 Siliques 6-12 mm long, 4-5 mm wide; seeds orbicular, cleft at the basal end; [AL (Lawrence and Morgan counties)].
                     11 Siliques 6-10 mm long; styles 3-6 mm long; petals white to yellow, 10-13 mm long; [AL (Lawrence and Morgan counties)]
                     11 Siliques 8-12 mm long; styles 1.5-3.5 mm long; petals yellow, 9-11 mm long; [AL (Morgan County)]