Triumfettii, the squarrose knapweed, is a species of plant belonging to the genus Centaurea of the family Asteraceae. The squarrose knapweed is an herbaceous perennial plant. This plant grows to a height of about 30–60 centimetres (12–24 in). The leaves are undivided and narrow-lanceolate. The period of flowering is from May until August. The inner flowers are bright purple, the outer ones are azure blue or deep mauve.