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See list of 2 species in this genus
  • 1a. Corolla yellow, 20–25 (–30) mm wide in life, the lobes short-fringed along part of the margin; flowers rarely replaced by spur-like roots; reproductive stem with a pair of opposite leaves subtending the umbel, sometimes extended beyond the umbel and producing additional inflorescences; fruit 12–25 mm long; seeds ciliate on the margin
  • 1b. Corolla white, 5–8 (–10) mm wide in life, the lobes not fringed on the margin; some flowers usually replaced by a cluster of spur-like roots [Fig. 725]; reproductive stem with a single, alternate leaf subtending the umbel; fruit 4–5 mm long; seeds not ciliate

 Show photos of:   Each photo represents one species in this genus.