The most interesting aster configuration occurs when the spindle is parallel to the surface.
Each centriole now consists of a pair of protein bodies surrounded by radiating strands of protein called the aster .
As with other members of the daisy family, annual aster flowers are composed of many long, slender petals radiating from a central disc of bright yellow.
The aster is considered the other classic autumn flower.
After the first hard freeze, cut back perennials such as aster , campanula, daylily, phlox, and veronica, leaving 6-inch stubs above the ground.
Meiosis is completed shortly after ovulation, concomitant with the formation of an extensive sperm aster nucleated by the sperm-derived centrosome.
After a bit of a summer lull, the blues of woodland asters and the yellows of woodland goldenrods render the forest vibrant in late August.
Plant late-blooming asters behind shorter perennials to hide the damage until they finish blooming.
Butterflies feasted on purple asters , and dragonflies zigzagged over the buttonbushes, which bore a crop of round, dry fruits.
Such abnormalities can be due to abnormalities in the number of asters and spindle structures at earlier stages of meiosis.