| 1 | 
  Galea conspicuously navicular, much enlarged, bent upward. | 
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  (2) | 
  | + | 
  Galea inconspicuously navicular, slightly enlarged, pointing forward or bent downward. | 
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  (5) | 
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  | 2 (1) | 
  Lobes of lower corolla lip narrow, lanceolate | 
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  18 Pedicularis angustiloba | 
  | + | 
  Lobes of lower corolla lip wider, ± rounded. | 
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  (3) | 
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  | 3 (2) | 
  Galea much longer than lower corolla lip, ca. 1.6 cm; lower lip ca. 8 X 11 mm | 
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  15 Pedicularis pseudosteiningeri | 
  | + | 
  Galea nearly as long as or slightly longer than lower corolla lip, ca. 1.4 cm; lower lip ca. 1.1 X 1.2 cm. | 
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  (4) | 
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  | 4 (3) | 
  Corolla tube short, nearly as long as calyx; 2 filaments pubescent, 2 completely glabrous including extreme apex | 
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  16 Pedicularis trichomata | 
  | + | 
  Corolla tube longer, ca. 1.5 X as long as calyx; 2 filaments densely hirsute, 2 glabrous except sparsely hairy at anther insertion | 
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  17 Pedicularis lophotricha | 
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  | 5 (1) | 
  Plants less than 30 cm tall; leaves to 3 cm; corolla rose, beak of galea long | 
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  24 Pedicularis craspedotricha | 
  | + | 
  Plants usually more than 30 cm tall; leaves to over 8 cm; corolla ± yellow, beak of galea indistinct. | 
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  (6) | 
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  | 6 (5) | 
  Calyx densely pubescent, lobes distinctly serrulate | 
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  19 Pedicularis ingens | 
  | + | 
  Calyx glabrous or sometimes sparsely pubescent, lobes entire or rarely serrulate. | 
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  (7) | 
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  | 7 (6) | 
  Corolla tube ca. as long as to slightly longer than calyx; leaves with 50 or more teeth on each side. | 
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  (8) | 
  | + | 
  Corolla tube 1.5--2 X as long as calyx; leaves with less than 50 teeth on each side. | 
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  (9) | 
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  | 8 (7) | 
  Calyx ca. 1.1 cm, lobes ± entire | 
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  20 Pedicularis steiningeri | 
  | + | 
  Calyx to 1.3 cm, lobes distinctly serrulate | 
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  21 Pedicularis pseudoingens | 
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  | 9 (7) | 
  Leaves incised-dentate; 2 filaments pubescent, 2 glabrous | 
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  22 Pedicularis trichocymba | 
  | + | 
  Leaves incised-lobed, ca. 1/3 distance from margin to midvein; all filaments glabrous | 
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  23 Pedicularis tongolensis |