Meikle, R.D. 1985: Flora of Cyprus 2
but modified and names used differing.
1Plants annual or biennial with a slender taproot; 20-50 (or more) cm high; stems glabrous, leaves often glabrous; achenes glabrous, anthers 1.8-2.0 mm long
1'Plants perennial with a thick taproot; generally less than 20 cm high; stems and leaves canescent to pubescent, rarely glabrous; anthers 4.0-6.0 mm long
2Involucre c. 10 mm long; achenes thinly lanuginose towards apex, with a hollow, sterile base; leaves pinnatisect
2'Involucre c. 15-20 mm long; achenes glabrous, not hollow at base; leaves entire