Centaurea macrocephala

The broad receptacle is bristly with dense whitish hairs (a bristly receptacle is diagnostic for the genus Centaurea). The achenes are not beaked and bear a pappus of capillary bristles.

Posted by Matt Lavin on 2016-08-30 20:53:54

Tagged: , Centaurea macrocephala , bighead knapweed , Asteraceae , Introduced , perennial , herb , disturbed site , cultivated , ornamental , escaped , Bozeman , Montana , fruits , fruiting head , pappus , receptacle , Burke Park

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