File:Centaurea melitensis USDA.jpg

Drawing for life of herbaceus Maltese star-thistle Centaurea melitensis. Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 559. Courtesy of Kentucky Native Plant Society.

Illustrations from N.L. Britton & A. Brown (1913): Illustrated Flora of the Northern States and Canada.