Spontaneous hybridizations are common in Cyprus as are more or less stabilized hybrid swarms. Determination of such hybrids can be tricky.
This new key needs further testing.
| 1 | Labellum without apical appendage |
| 1' | Labellum with apical appendage |
| 2 | Margin of labellum more or less flat, with broad yellow zone |
| 2' | Margin of labellum deflexed, brownish, reddish or with a narrow yellowish zone |
| 3 | Base of labellum flat |
| 3' | Base of labellum longitudinally furrowed and V-shaped |
| 4 | Labellum 9-15 mm long, pale green beneath |
| 4' | Labellum 15-23 mm long, brownish-red beneath |
| 5 | The 2 inner petals very small, 1-2 mm long |
| 5' | The 2 inner petals longer, at least 3 mm long |
| 6 | Inflorescence (2-)7-10(-15)-flowered; flowers more or less horizontally positioned, 7-12 x 10 mm; dorsal sepal curving forward |
| 6' | Inflorescence 3-5(-7)-flowered; flowers somewhat reflexed, 10-12 x 10-15 mm; dorsal sepal reflexed |
| 7 | Middle lobe of labellum triangular, lateral edges strongly bent backwards; marking of labellum (speculum) normally horseshoe- or spectacle-shaped, sometimes reduced to crescents or flecks |
| 7' | Middle lobe of labellum not triangular, if rarely so, then marking of labellum (speculum) H-shaped |
| 8 | Labellum and speculum dark brown, black-purple to black-violet, with variable silvery or white markings |
| 8' | Labellum and speculum differently coloured, without conspicuous white markings |
| 9 | Sepals green; white markings covering entire labellum |
| 9' | Sepals pink or purple; white markings of labellum drop-shaped, often connected |
| 10 | Labellum basally 3-lobed |
| 10' | Labellum usually entire, but often terminally somewhat incised or even 3-lobed |
| 11 | Labellum shorter than sepals; anther-connective 1.5-2 mm long |
| 11' | Labellum longer than or equalling sepals; anther-connective usually less than 1.5 mm long |
| 12 | Mid-lobe of labellum broadest at or below the middle; sepals pale pink to purple-violet; labellum (8-)10-12 mm long |
| 12' | Mid-lobe of labellum broadest towards the apex; sepals pure green, greenish-white to pale pink; labellum 6-15 mm long |
| 13 | Sepals pure green; labellum (6-)8-15 mm long |
| 13' | Sepals greenish-white to pale pink; labellum 6-8(-10) mm long |
| 14 | Labellum rectangular, trapezoid; apical appendage of labellum directed upwards |
| 14' | Labellum not rectangular, mostly ovate to oval; apical appendage of labellum directed forwards or downwards |
| 15 | Anther-connective short, to 1 mm long; lateral protuberances of labellum usually prominent |
| 15' | Anther-connective long, rostrate, 1.5-3.5 mm long; lateral protuberances of labellum usually inconspicuous or absent |
