Sandwort

...An annual to perennial weed of the Caryophyllaceae family (illustration), commonly found on roadsides and in sunny fields. The Japanese name is derived from the small round leaves, which resemble fleas' kimonos. The stem branches at the base and then rises, forming a clump 15-25cm tall. The leaves are opposite, sessile, small, about 5mm long, ovate, and pointed at the tip. From April to June, the plant produces many small flowers in a large, open cyme. The flowers are about 5mm in diameter, have five white petals, and are not incised. They have 10 stamens and 3 styles. The fruit is ovate with six lobes at the tip, and spills small seeds. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…道端や畑の日当りのよい所に普通にみられるナデシコ科の一年～多年生の雑草（イラスト）。和名は，小さな丸い葉を蚤の着物にたとえたもの。茎は基部で枝分れしたあと立ち上がり，高さ15～25cmの株立ちとなる。葉は対生し，無柄で小さく，長さ約5mm，卵形で先はとがる。4～6月，大きく開いた集散花序に小さな花を多数つける。花は直径約5mm，花弁は5枚で白色，切れ込みはない。おしべ10本，花柱3本。果実は卵形で先は6裂し，小さな種子をこぼす。…

※「sandwort」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