Anacyclus freynii Porta & Rigo ex Willk. accepted as Anacyclus pyrethrum (L.) Lag. (original description)
Carduus assoi Willk. accepted as Carduus nigrescens subsp. vivariensis (Jord.) Bonnier & Layens (original description)
Centaurea inuloides Willk. accepted as Centaurea nemoralis Jord. (original description)
Cineraria coincyi (Rouy) Willk. accepted as Tephroseris coincyi (Rouy) Holub (original description)
Hieracium cataractarum Arv.-Touv. ex Willk. (original description)
Hieracium elisaeanum Arv.-Touv. ex Willk. (original description)
Hieracium portae Willk. (original description)
Hieracium torrepandoi Willk. (original description)
Leontodon reverchonii Freyn ex Willk. (original description)
Sonchus loscosii Willk. (original description)
Tragopogon badali Willk. (original description)