Japanese name: コメナモミ(小雌菜揉、小豨薟) Scientific name:Sigesbeckia glabrescens
[Overview]
An annual 0.3–1 m tall, found in hills and fields.
The stem and leaves have short hairs.
The leaves are simple and opposite, ovate-triangular, 5–13 cm long and 3.5–11 cm wide, with toothed margins.
The petiole is winged.
Flower heads about 1 cm across are borne at the branch tips.
The flower head stalk is 1–3 cm long and usually has no glandular hairs.
The flower heads are yellow and consist of ray flowers and tubular flowers.
The ray flowers are 3-lobed and the tubular flowers are 5-lobed.
The involucre is densely covered with glandular hairs, and there are 5 spatulate involucral bracts that spread out flat.
The fruit is an achene about 0.2 cm long, without pappus.