Japanese name: オオユウガギク（大柚香菊） Scientific name:Aster robustus
[Overview]
A perennial 1–1.5 m tall, found along roadsides and in mountains.
It has long, creeping underground stems.
The stem is erect and branches in the upper part.
There are basal leaves and stem leaves; the basal leaves have withered by flowering time.
The stem leaves are simple and alternate, ovate-oblong, with large incised teeth on the margin.
The leaves become smaller toward the top of the stem.
One to several flower heads are borne at the branch tips.
The flower heads are about 3–3.5 cm across, with 10–20 pale purple ray florets.
The involucral bracts are in 3 rows.
The achene is flattened and obovate, about 0.3 cm long, and the pappus is 0.1–0.2 cm long and uneven.
