The flowerheads of the white wood aster are flat-topped. They measure approximately 2.5 cm wide with 6-10 rays surrounding a yellow or purple central disk. The white wood aster's bracts are generally white with green tips.
The fruit are tipped with white bristles and are seed-like and dry.
The long, characteristically heart-shaped leaves of the white wood aster are long and coarsely toothed. These leaves are range between 5cm and 18 cm in length.
White wood aster typically inhabits dry open wooded areas.
The larger, thicker leaves of the related largeleaf aster (Aster macrophyllus), can be harvested when they are young, cooked, and consumed as greens.
White wood aster usually blooms in the late summer to early fall season.