Centaurea nigra L. in Poland – the occurrence and status : [poster]

Abstract

Centaurea nigra is a perennial herb with rough shoots, growing up to 20-70 cm in height. Typically, its anthodia are formed individually, at the ends of shoots. Involucres of capitula have a nearly spherical shape. Appendages of involucral bracts are of round shape, black or blackish-brown, and regularly pectinate-fimbriate. The florets are all tubular, which is its fairly distinguishing feature. Typically, achenes have short pappus, about 1 mm (Fragment tekst).