sentences:  The flowers are borne on a sessile head surrounded by leaves and with tapering hairy, linear involucral bracts up to long at the base of the head.There are between 25 and 35 flowers in each head, each flower with a curved, pale yellow to purple perianth long and a reddish brown pistil long.Flowering occurs from May to June and one or two broadly egg-shaped or wedge-shaped follicles long form in each head.