Centaurea

Bakali, A. Homrani & Susanna, A., 2022, Centaurea achilleifolia (Asteraceae), a new endemic species from the Oriental Middle Atlas of Morocco, Phytotaxa 542 (1), pp. 83-89 : 88

A new identification key for the C. sect. Melanoloma species studied above (Tab. 4) in Morocco is proposed:

1. Rosette leaves oblong bipinnatisect............................................................................................................................. C. achilleifolia

– Rosette leaves pinnatifid to pinnatipartite .......................................................................................................................................... 2

2. Rosette leaves oblong runcinate-pinnatifid dentate................................................................................................... C. oriolii-bolosii

– Rosette leaves lyrate-pinnatipartite to pinnatifid................................................................................................................................ 3

3. Achenes epappose .............................................................................................................................................................................. 4

– Achenes with pappus.......................................................................................................................................................................... 5

4. Involucral bracts arachnoid, appendages of the middle bracts pinnate-spinose.................................................................. C. peltieri

– Involucral bracts finely ciliolate, appendages of the middle bracts subpalmate strigose............................................. C. takredensis

5. Involucral bracts finely ciliolate, appendages of the middle bracts subpalmate, strigose................................................... C. atlantis

– Involucral bracts glabrous, appendages of the middle bracts black, triangular, acute ................................................... C. gattefossei