Japanese name: ナンカイウスベニニガナ（南海薄紅苦菜） Scientific name:Emilia fosbergii
[Overview]
An annual 0.2–1 m tall.
The stem is usually unbranched and rises erect or at an angle.
The leaves are alternate and evenly spaced along the stem.
The leaves at the base and lower part of the stem are ovate, 5–10 cm long and 3–5 cm wide, with margins that are entire, serrated, or shallowly cut, and have petioles.
The petioles have narrow wings, and the leaf bases clasp the stem.
The leaves in the middle of the stem are elliptic to elliptic-lanceolate, with margins that are entire or serrated, and the leaf bases half clasp the stem.
It flowers almost all year round.
2–5 flower heads are borne sparsely in corymbs at the stem tip, with 1–2 bracts at the base of the stalk.
The flower heads consist entirely of tubular florets and are pale pink to pink.
The involucre is a narrow cylinder 0.5 cm across and 0.9–1.4 cm long, with about 10 bracts in one row.
The fruit is an achene with white pappus.
[History]
It has become naturalized in the Yaeyama Islands and the Ogasawara Islands.
