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Key to Chthamalia

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1 Stems twining, usually climbing; leaf blades > 2× as long as wide, 5-7 mm wide; follicles 5-8× as long as wide, < 1 cm wide
1 Stems sprawling, not climbing (sometimes scandent on low vegetation); leaf blades 1-1.5× as long as wide, 1.5-3.5 cm wide; follicles 2-4× as long as wide.
  2 Corolla lobes glabrous on their upper (adaxial) surface.
    3 Corolla lobes 1-3 mm long, visibly faintly to strongly reticulate-veined; peduncles (20-) 40-73 mm long; [s. TX]
    3 Corolla lobes 2.5-4 mm long, not visibly reticulate-veined; peduncles 0-30 mm long; [c. and n. TX, OK]
  2 Corolla lobes hairy on their upper (adaxial surface), at least near the base of each lobe
      4 Corolla lobes hirtellous (short-hairy) towards the base, or rarely to nearly the tip; [s. TX]
      4 Corolla lobes pilose to hirsute (long-hairy) from base to nearly the tip; [either FL or c. and n. TX, OK.
        5 Inflorescences 1-2-flowered; corollas rotate-campanulate (the petal lobes spreading more-or-less in a plane), 3-6 mm long, 3-5× as long as the widest point, maroon or dark-brown on the upper surface; [c. and n. TX, OK]
        5 Inflorescences 1-6-flowered; corollas campanulate (the petal lobes ascending), 2-3.5 mm long 1.2-2× as long as the widest point, green, yellow, brown, or pink on the upper surface; [FL]