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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Aureolaria

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1 Calyx lobe margins crenate or pinnatifid (sometimes entire or nearly so); plant pubescent (especially on the calyx, corolla, capsule, and lower stem) with glandular hairs; annual; seeds 0.8-1.0 mm long, not winged.
  2 Calyx tube hemispherical, about as long as wide, glandular-hirsute to glandular-lanate on the outer surface; capsule ovoid; hairs of the leaves usually glandular, at least in part; leaf lobes usually acute
  2 Calyx tube turbinate, longer than wide, glandular-puberulent on the outer surface; capsule ellipsoid; hairs of the leaves usually nonglandular; leaf lobes usually obtuse
1 Calyx lobe margins entire; plant glabrous or pubescent with nonglandular hairs; perennial; seeds 1.3-2.7 mm long, winged.
    3 Capsules densely pubescent; inflorescence, pedicels, and/or calyx pubescent with dingy, nonglandular hairs; pedicels 1-3 mm at anthesis; flowering May-Jul
    3 Capsule glabrous; inflorescence, pedicels, and calyx glabrous (or pubescent with white nonglandular hairs); pedicels 1-25 mm long at anthesis; flowering Aug-Oct.
      4 Lower and midstem white-puberulent; leaf blade surfaces puberulent; IN, IL, MO, AR, and MS westward].
        5 Calyx lobes broadly lanceolate, evidently dentate; petioles mostly 5-6 mm long; e. OK to e. TX]
        5 Calyx lobes linear to lanceolate, entire or with a few teeth; petioles mostly 10-15 mm long; [IN, IL, MO, and KS south to s. MS , ne. TX, and e. TX].
          6 Blades of all the leaves deeply lobed; capsules 15-23 mm long
          6 Blades of at least the upper leaves entire, toothed, or with only basal lobes; capsules 10-17 mm long
      4 Lower and mid-stem glabrous; leaf blade surfaces glabrous; [IL, MO, AR, and MS eastward].
             7 Inflorescence, pedicels, and calyx pubescent (at least sparsely so); pedicels slender, ca. 0.5 mm in diameter
             7 Inflorescence, pedicels and calyx glabrous; pedicels stout, ca. 1 mm in diameter.
               8 Lower leaves entire to serrate (or with only a few shallow lobes at the base of the leaf); pedicels 1-8 mm long at anthesis, straight; corolla 3.0-4.0 cm long; capsule 10-15 mm long; stem not glaucous
               8 Lower leaves pinnately lobed, the lobes themselves usually serrate, the sinuses extending over half of the distance to the midrib; pedicels 4-25 mm long at anthesis, upwardly curved; corolla 3.5-6 cm long; capsule 12-20 mm long; stem slightly to strongly glaucous.
                 9 Leaf blades deeply pinnately lobed, the lobes linear to linear-lanceolate; seeds ca. 1.5 mm long, narrowly winged, the distance across the seed ca. 1.2 mm; [Interior Highlands of MO and AR]
                 9 Leaf blades pinnately lobed, the lobes lanceolate or broader; seeds ca. 2.0-2.5 mm long, broadly winged, the distance across the seed ca. 2 mm; [widespread]
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