Eryngium
Meikle, R.D. 1977: Flora of Cyprus 1 but supplemented and modified
| 1 | Bracteoles entire |
| 1' | Bracteoles 3-lobed at apex, with spinose lobes |
| 2 | Capitula in spreading, corymbose or domed cymes; leaf-sheaths short and inconspicuous |
| 2' | Capitula in narrow, thyrsoid inflorescences; leaf-sheaths broad |
| 3 | Involucral bracts subulate, entire or remotely spinose, less than 3 mm wide; capitula numerous in lax, slender-branched inflorescences |
| 3' | Involucral bracts ovate, 0.5-2 cm wide, coarsely spinose; capitula rather few in rigid, thick-branched inflorescences |
