CENTAUREA

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Taxonomic limits of Centaurea have been controversial. The genus has great morphologic diversity, and studies have revealed much cytologic (e.g., N. Garcia-Jacas et al. 1996) and palynologic (e.g., G. Wagenitz 1955) variation as well. During the nineteenth and twentieth centuries, various taxonomists attempted, with limited success, to divide Centaurea into smaller genera or workable infrageneric taxa. The relations of several satellite genera have been controversial as well.

Facts about "CENTAUREA"
apex external textureglabrous + and with fine , 1-celled hairs +
apex shapeentire + and denticulate +
appendage orientationerect + and spreading +
appendage shapedentate +, fringed +, linear +, ovate + and oblong +
array architecturecorymbiform +
base shapetailed +
bristle architecturesmooth + and barbed +
bristle external texturestiff +
chromosome count8 +, 9 +, 10 +, 11 +, 12 +, 13 + and 15 +
corolla arrangementbilateral + and radial +
corolla colorationwhite +, blue +, pink +, purple + and yellow +
corolla positioninner +
corolla prominenceinconspicuous +
corolla reproductionfertile +
corolla shapebent +
corolla sizeslender +
cypsela architecture or external texture or reliefsmooth +
cypsela architecture or shaperibbed +
cypsela shapebarrel-shaped + and compressed +
face external textureglabrous +, tomentose +, villous +, strigose + and puberulent +
face patternglandular-punctate +
floret positionouter +
floret reproductionsterile +
hair architecture1-celled +
hair widthfine +
head architecture or arrangementradiant +
head architecture or shapediscoid + and disciform +
head arrangementsingly + and in corymbiform arrays +
involucre shapecylindric +, ovoid + and hemispheric +
leaf architecturepetiolate + and sessile +
leaf positionbasal + and cauline +
lobe shapelinear-oblong + and acute +
margin architecture or shapespiny +
margin positiondistal +
margin shapelobed + and entire +
margin sizesmaller +
node external texturehairy +
pappus count0 +
pappus durationpersistent +
part orientationappressed +
part shapespine-tipped + and spineless +
part sizeexpanded +
phyllary countmany +
phyllary sizeunequal +
portion fusiondistinct +
portion sizeminute +
receptacle architectureepaleate +
receptacle external texturebristly +
receptacle prominence or shapeflat +
scale architecturesmooth + and barbed +
scale external texturestiff +
scale widthnarrow +
scar positionlateral +
stem architecturesimple + and branched +
stem orientationerect +, ascending + and spreading +
whole organism life styleannual +, biennial + and perennial +