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Key to Triodanis

Campanulaceae

Triodanis

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1 Upper leaf surfaces hispidulous to strigose; calyx lobes mostly > 1 cm long; [nc. & c. TX to Mexico]
1 Upper leaf surfaces glabrous; calyx lobes mostly < 1 cm long; [collectively widespread].
  2 Bracts linear to lanceolate, 3.5-10× as long as wide; capsules dehiscing along 1 pore or longitudinal slit at apex; cleistogamous capsules usually > 8 mm long
  2 Bracts broader, ovate to orbicular or reniform, 0.5-3x as long as wide; capsules dehiscent by 2-3 pores; cleistogamous capsules usually < 8 mm long
    3 Pores (openings) of capsules near middle
      4 Pores linear to narrowly oblong, 0.2-0.5 mm wide; the cartilage (which peels out resulting in the open pore) with narrowly scarious margins; [sw. TN westward]
      4 Pores ovate-oblong, broadly elliptic, or rounded, 0.5-1.5 mm wide, the cartilage with broad scarious margins; [collectively more widespread].
        5 Stems and leaf undersides glabrous to scabrous or pilose only along veins; seeds smooth or muriculate and lustrous; [widespread]
        5 Stems and leaf undersides densely hirsute to pilose; seeds reticulate and lustrous; [nc. and e. TX to s. TX]
    3 Pores (openings) of capsules near apex
          6 Bracts longer than wide, <1 cm wide; seeds 0.4-0.6 mm long
          6 Bracts wider than long or as long as wide, >1 cm wide; seeds 0.7-1 mm long