Onopordum acaulon - White Stemless Thistle (horse thistle - Wikipedia)
Valenciano: Cardassa blanca
Castellano: Cardo blanco sentado
A large flattened rosette of greyish or whitish spiny lobed leaves and a single, or cluster of almost stalkless white flowers; bracts hairless and spine-tipped; leaves very spiny.
Flowers: May to July - photogrpahed in early May on the Alfaro
Refs: Plantas Sylvestris de la Comunidad Valenciana; Flowers of SW Europe, Polunin & Smythies; Wikipedia

Marina Alta Walks