Rhynchospermum verticillatum Reinw.

Japanese: シュウブンソウ(英語表記)Rhynchospermum verticillatum Reinw.
Rhynchospermum verticillatum Reinw.
A single species in one genus, this perennial herb of the Asteraceae family is found in eastern and southern Asia (illustration). It grows on the forest fringes of mountainous areas west of the Kanto region. It grows to a height of 50-100cm. The trunk stops growing at about 30-50cm, and 2-4 branches unfold at an angle. The leaves are lanceolate, alternate and sparsely toothed. The leaves on the trunk reach a length of 15cm, but those on the branches are much smaller. Flowers appear from August to October as terminal heads on short twigs that emerge from the axils of the leaves on the branches. The heads consist of tubular and ray florets, and the flowering diameter is small at 4-5mm.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
1属1種で,アジアの東部から南部にかけて分布するキク科の多年草(イラスト)。関東以西の山地の林縁に生える。草丈は高さ50~100cm。主幹は30~50cmくらいで生長が止まり,2~4本の枝を斜めに開出する。葉は披針形で,まばらに歯牙(しが)があり互生する。主幹の葉は長さ15cmに達するが,分枝の葉は一段と小さい。花は8~10月,分枝につく葉の腋(わき)から出る短い小枝に頂生する頭花である。頭花は筒状花と舌状花とからなり,開花直径は4~5mmと小さい。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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