Key to the subspecies of Disperis circumflexa
| 1a | Flowers yellowish-green; hood of the median sepal taller than deep, c. 1,5 mm deep | subsp. circumflexa |
| 1b | Flowers green and white; hood of the median sepal deeper than tall, 6,5-8 mm deep | subsp. aemula |
World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 12/09/2020
