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Key to Brassicaceae, Key C: plants in fruit, trichomes of plant absent or, if present, unbranched

Brassicaceae

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1 Fruits silicles (< 3× as long as wide).
  2 Fruits 2-segmented
    3 Plants succulent, leaves usually fleshy
    3 Plants herbaceous, not succulent, leaves not fleshy
  2 Fruits unsegmented.
      4 Fruits 2 cm or more wide
      4 Fruits < 2 cm wide.
        5 Fruits with 20 or more seeds
        5 Fruits with 16 or fewer seeds.
          6 Fruits with 1 seed.
          6 Fruits with 2-16 seeds.
               8 Fruits with more than 2 seeds.
                   10 Stems 5-12 (-20) dm tall; leaf blades of basal leaves (3-) 5-12 (-17) cm long
                   10 Stems 0.5-1.5 (-2) dm tall; leaf blades of basal leaves 0.3-1.5 (-2) cm long
                     11 Plants not fetid; seeds usually smooth, yellowish to medium brown
                     11 Plants fetid; seeds striate or alveolate, dark gray to dark brown or black
1 Fruits siliques (> 3× as long as wide).
                          13 Fruits segmented, usually more than 1-seeded.
                                                 24 Fruit stipitate; cauline leaves entire, not auriculate; flowers pink to purple (or white in W. carteri), [natives of sandhills and coastal plain, NC to s. MS]
                                                 24 Fruit sessile or short-stipitate; cauline leaves usually lobed or at least dentate, the bases auriculate or somewhat clasping; flowers yellow; [non-natives, widespread]
                                                                 31 Cauline leaves usually ascendant and concealing stems (at least basally); petals 2-5 mm long (except for 5-10 mm long in B. missouriensis)
                                                                       34 Basal leaves usually present at flowering or after; cauline leaves with linear, filiform, lyrate, or runcinate lobes (occasionally unlobed, but if so then leaves usually linear or otherwise thin); petals yellow; [non-natives of various habitats]