Centaurea nervosa

Perennial of the Asteraceae family, Centaurea nervosa is a strictly mountainous species, native to the Alps and northern Apennines, where it grows in alpine meadows, stabilized scree, and sunny rocky slopes, generally between 1,500 and 2,800 meters in altitude. It favors well-drained, calcareous or siliceous substrates.

It forms low and compact clumps, 20 to 50 cm in height, with an upright but not bulky habit. The basal leaves are long-petioled, pinnately lobed to pinnatifid, medium green, with well-marked veins that gave the species its name. The cauline leaves are progressively reduced towards the top of the stems.

The flower heads are solitary, well-individualized, borne on sparsely branched stems. The involucre is remarkable: its scales are equipped with dark brown to blackish, fringed pectinate appendages, giving the flower bud a very distinctive hairy and bristly appearance before anthesis. The tubular flowers are bright pink-purple to violet, with the peripheral ligules slightly longer and radiating.

In its natural habitat, flowering extends from July to September depending on altitude.

In cultivation, it requires full sun, perfect drainage, and a poor to moderately rich soil. It is well-suited to rock gardens and alpine gardens, where its dark involucre and bright flowers create a striking contrast rarely equaled in the genus.