Botanical atlas

Greater Knapweed

Centaurea scabiosa

Long before it was tidied into flower beds, greater knapweed grew wild across the chalky meadows of Europe, where country folk came to know it as a steady, astringent friend for the skin. Its bruised leaves and flowers were traditionally pressed onto cuts, bruises, and stubborn sores, and a cooled infusion was gargled for sore throats or dabbed onto irritated skin. Herbalists of earlier centuries also turned to the root for swollen glands, which is likely how the plant earned its old reputation as a remedy for what was then called scrofula. Through it all, its shaggy purple blooms have done double duty as one of the finest nectar plants a meadow can offer, drawing bees, butterflies, and burnet moths from midsummer to first frost.

Safety.

Greater knapweed has no significant record of toxicity, though as a daisy-family plant it may cause allergic reactions in people sensitive to ragweed or related plants.