The basal leaves of Aster are oblong or elliptic spoon shaped, and the lower part gradually narrows to a long stalk, with a total length of 20-50 cm. The lower leaves are spoon shaped oblong, and the middle ones are oblong or lanceolate. All leaves are thick paper.
The leaves of purple calyx are ovate to ovoid, rarely cuneate at the base, petiole about 6-30 cm.
Asters are mostly heads with long peduncles and linear bracts. The involucral bracts are 3-layered, linear or linear lanceolate. There are about 20 ligulate flowers, and the tongue is blue and purple.
The scape of calyx is about 60-100 cm tall and has 10-30 flowers. Bracts are oblong lanceolate, white. When in full bloom, the perianth tube is nearly funnel-shaped, and the color is purplish red.
