Centaurea macrocephala

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Although Centaurea macrocephala is cultivated as an ornamental and for cut flowers in many areas, it has been declared a noxious weed by the state of Washington because of its potential status as an invader.

apex shapeacute +
appendage colorationbrown +
appendage external texturescarious + and glabrous +
appendage orientationerect + and spreading +
appendage shapelacerate fringed + and tipped +
appendage sizeexpanded +
blade shapeoblanceolate +, ovate +, lanceolate +, entire + and undulate +
body colorationgreen + and stramineous +
body external textureglabrous +
body shapeovate + and lanceolate +
bristle shapeflattened +
chromosome count18 +
corolla colorationyellow +
corolla size4 +
floret countmany +
floret sizeexpanded + and 3.5 +
flowering timesummerjun +, jul +, aug + and sep +
habitatgarden escape in meadows , grassy clearings +
hair architectureseptate +
head architecturesessile +
head architecture or arrangementradiant +
head architecture or shapedisciform +
head arrangementcrowded + and singly +
head other or positionproximal +
involucre shapeovoid + and hemispheric +
leaf architecturepetiolate +
leaf external textureshort-villous +, arachnoid + and glabrate +
leaf other or positionproximal cauline +
leaf patternresin-gland-dotted +
leaf positionbasal +
leaf sizereduced +
margin architecturesessile +
margin positioncauline +
margin shapeentire +, dentate + and decurrent +
margin sizesmaller +
scale countmany +
scale shapesetiform +
spine fragilityweak +
stem architectureunbranched + and branched +
stem countseveral +
stem external texturevillous + and arachnoid-tomentose +
stem orientationerect +
whole organism life styleperennial +