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1 Mid-cauline leaf blades linear to linear-oblanceolate, 1-3 (-4) mm wide; involucres 4-7 tall × 10-15 mm wide; rays 14-19, corollas 6.5-9.5 mm long; [West Gulf Coastal Plain of TX] | |
1 Mid-cauline leaf blades oblanceolate to oblong or oblong-lanceolate, (1-) 4-15 (-25) mm wide; involucres (4.5-) 6-15 tall × 9-30 mm wide; rays (13-) 17-38, corollas 6-19 mm long; [OK, TX, LA, MS, and FL]. | |
2 Mid-cauline leaf blades (1-) 4-15 (-25) mm wide; phyllaries in 3-4 series, these strongly unequal; phyllaries ca. 0.9-1 mm wide, their apices broadly spreading to squarrose; [ec. OK westwards] | |
2 Mid-cauline leaf blades (2.5-) 4-13 mm wide; phyllaries in 3-4 series, these subequal; phyllaries 1.3-1.7 mm wide, their apices erect to spreading; [Gulf Coastal Plain]. | |