| 1 | Florets dirty white, plant less than 30 cm high |
| 1' | Florets violet-purple; plant usually more than 30 cm high |
| 2 | Florets bright violet-purple; involucre broadly ovoid-subconical, often as wide as long; style branches c. 15 mm long |
| 2' | Florets light violet-purple; involucre ovoid to conical, constricted at apex, generally longer than wide; style branches 7.5-9.5 mm long |
