saw-wort

Serratula marginata is a perennial herb in the family Asteraceae, belonging to the genus Serratula, commonly known as saw-worts. The genus Serratula comprises approximately 70 species distributed across Eurasia, from the Atlantic coast of Europe to East Asia, with centers of diversity in the Mediterranean region and Central Asia. The epithet 'marginata' means 'margined' in Latin, referring to distinctive margins on leaves, phyllaries, or other plant parts—possibly white or papery margins on the involucre bracts that give a defined edge appearance. Saw-worts are thistle-like perennials with deeply serrate or pinnately lobed leaves, the leaf margins bearing fine but sharp teeth (serrations) rather than the stout spines of true thistles (Cirsium). Stems are erect, branched above, and the plant lacks the spiny stem wings characteristic of Carduus. Capitula are discoid, with purple to pink (rarely white) tubular florets. The involucre is ovoid to cylindrical with numerous rows of imbricate, often colored or papery-margined phyllaries. The pappus consists of rough or scabrid bristles in several rows. Achenes are oblong and somewhat compressed. Serratula species inhabit grasslands, meadows, scrubby vegetation, woodland edges, and rocky slopes across Eurasia. Several species are used in phytochemistry research due to their ecdysteroid content—plant hormones with structural similarity to insect molting hormones that may have pharmacological applications. The genus contributes to European and Asian meadow biodiversity.