Centaurea macrocephala, is a member of the thistle group (Cynareae) in the sunflower family. This definite types is the highest knapweed growing in the Hawaiian North west, ranging from two to five feet in height, with regards to the environment. The place arises are straight and unbranched, ending in a single bloom go. The simply actually foliage is commonly puncture designed with toothed sides and indicated tips, and they have a tough surface. Basal or rosette simply actually foliage is stalked and they can reach 15 in. long and three in. wide. The simply actually leaves and foliage stalks are gradually smaller up on the place come, with the top simply actually leaves being stalkless. The individual bloom heads are globe designed, and one to three in. across. The bracts within the bloom go have slim, papery, surrounded edges. The lower bracts show evidence of spines. The flowers are yellow.
