Blackstonia
Meikle, R.D. 1985: Flora of Cyprus 2 but slightly modified and names used differing
| 1 | Calyx divided almost to base into linear-filiform lobes; pedicels slender, generally less than 2 cm long; styles united for c. 1.5 mm; cauline leaves conspicuously perfoliate |
| 1' | Calyx with a distinct cupular base, lobes lanceolate-subulate; pedicels stout, commonly 2-3(-8) cm long; styles united for 2.5-3.5 mm; cauline leaves shortly connate, not conspicuously perfoliate |
