Perennial, diffused, hirsute herb with ascending branches reaching up to 40-60 cm high; leaves long, petiolate, deeply pinntifid into linear segments, hairy on both surfaces; flowers in dense, corymbose, capitate heads, elongating in fruits; bracts equal to calyx lobes in length; calyx tubular, 5 toothed, 5-nerved, one nerve terminating in each setaceous lobes; corolla white or pink-purple, infundibuliform, limbs flat, spreading or oblique, lobes-5, tube cylindric, straight or curved, pubescent outside, throat hairy; stamens 4, didynamous, inserted in upper half of corolla tube; stamens 4, slightly exserted, didynamous, anther ovate; ovary imperfectly 4-celled, 4-ovuled, solitary in each locule, style filiform; stigma shortly bifid; fruits schizocarpic, dry, enclosed in calyx, splitting into 4-seeded, nutlets, dark brown.