Open spreading form. Dead stem leaves very curly.
Similar species: Heath Aster (Symphyotrichum ericoides) Frost Aster (Symphyotrichum pilosum) - Stem very hairy, resembles frost (although there is a variety that is not hairy!). Calico Aster (Symphyotrichum lateriflorum)
Flowers: Summer, Autumn; White; 7 or more parts (petals); 1-2cm in diameter. Ray flowers: 16-47, usually white. Disc flowers: 20-40, whitish to yellowish, turning purple. Flowers spread out, not on one side of the stem.
Leaves: Alternate, Simple, Entire; Long and narrow, lance-shaped. Dead leaves along the stem tend to be very curly, as in a spiral. Lower leaves usually gone by flowering. The biggest leaves are in the upper middle of the stem.