?
Perhaps S. lanceolatum. Abundant in very rocky area, all shriveled like this.
Inspired by discussion here: www.inaturalist.org/observations/144096713
Second photo a frame from video of leaf detaching easily
Inspired by discussion here: www.inaturalist.org/observations/144096713
Phemeranthus: Greek ephemeros, living for one day, and anthos, flower.