Aster-like plants, tall, from open grassy places and woods of North America. Flowers typically white, pink, with may fine ray-florets, small, but in quantity. Named after James Bolton, 18th century British naturalist, mycologist and illustrator.
As with all 'daisy-like' flowers, the disc-flowers in the centre of the flowerhead produce nectar and pollen that are attractive to insects and particularly in late summer and early autumn. Bees, hoverflies and some butterflies such as red admirals are amongst the frequent visitors.