Thalictrum

...A perennial herb of the Ranunculaceae family (illustration) that grows in mountain grasslands and sparse forests, as well as in the alpine zone. The stems reach a height of about 80 cm, are erect and branched. The leaves are large, 3-4 times trifoliate, and the leaflets are shallowly lobed but not sawtoothed. The undersides are whitish. The base of the petiole forms a leaf sheath. The tip of the stem forms a large corymb, which produces many small flowers from July to September. The sepals are white or pale pink and fall off quickly. There are no petals. The stamens are about 1 cm long, and the filaments are usually white and swollen club-shaped at the top. ...

*Some of the terminology that mentions "Thalictrum" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…山地の草原や疎林中，また高山帯にも生えるキンポウゲ科の多年草（イラスト）。茎は高さ80cmくらいに達し，直立し，分枝する。葉は大きく，3～4回3出複葉，小葉身は浅裂するが，鋸歯はない。裏面は白みを帯びる。葉柄の基部は葉鞘（ようしよう）になる。茎の先は大きな散房状の花序となり，7～9月ころ小さな花を多数つける。萼片は白色ないし淡紅色，早く落ちる。花弁はない。おしべは長さ約1cm，花糸はふつう白色で上部は棍棒状にふくれる。…

※「Thalictrum」について言及している用語解説の一部を掲載しています。

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