#flora of Greece
- Acanthus carolialexandri — A rare species of perennial herbaceous plant in the Acanthus genus, native to the Balkan Peninsula (endemic to certain arid and mountainous regions of Greece). The taxon is characterized by leaves tightly arranged in a basal rosette with sharp lobes, and rigid flower stalks bearing flowers protected by spiny bracts. It represents a niche floristic element adapted to rocky Mediterranean microclimates, primarily described and studied in East European phytotaxonomic literature.