Iād look into using a loop and the drawing api.
Edit: I had some time on my hands, so I wrote up a quick script
onLoad = function() {
createEmptyMovieClip("dandilion", 1);
dandilion.lineStyle(1, 0x000000, 100);
width = 150;
lines = 100;
for(i=0; i<lines; i++) {
dandilion.createEmptyMovieClip("line"+i, i);
dandilion["line"+i].lineStyle(1, 0x000000, 100);
dandilion["line"+i].moveTo(0-(width/2), 0);
dandilion["line"+i].lineTo((width/2), 0);
dandilion["line"+i]._rotation = (i*(360/lines));
}
dandilion._x = Stage.width/2;
dandilion._y = Stage.height/2;
}
It will create a dandilion in centered on the stage. If you change the width variable, it will change the diameter of the dandilion, and the lines variable will change the number of lines used in the circle.
Hope this helps