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Key to Tetraneuris

Asteraceae

Tetraneuris

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1 Annual herbs from fibrous roots.
  2 Pappus scales not aristate; leaves densely hairy; leaves of the middle stem (2.5-) 3.9-9.5 (-16) mm wide; involucres 12-15 in diameter
  2 Pappus scales aristate; leaves hairy; leaves of the middle stem (0.9-) 1.4-3 (-4.8) mm wide; involucres (7-) 8-11 (-12) mm in diameter
1 Perennial herbs from a caudex.
    3 Leaves moderately to densely woolly; stems erect or decumbent; [s. TX Sand Plain]
    3 Leaves sparsely to densely hairy, but not woolly; stems erect; [TX and OK westward].
      4 Stems densely woolly among proximal leaves; leaves not crowded (internodes evident); [s. TX]
      4 Stems not densely woolly among proximal leaves; leaves crowded (internodes not evident); [OK and TX westwards]