Japanese name: コモチナデシコ（子持撫子） Scientific name:Petrorhagia prolifera
[Overview]
A biennial 10–50 cm tall, found along roadsides, on wasteland and on riverbanks.
The stem branches well from the base.
The upper part of young stems is hairy.
The leaves are simple and opposite, linear, 2–3 cm long, and the pair of leaves are fused at the base.
A spherical inflorescence about 2 cm across is borne at the stem tip.
The inflorescence is enclosed by overlapping membranous involucral bracts, and the flowers peek out from between them.
The flowers are pale pink and 5-petaled.
The fruit is a capsule, which splits into 4 at the top when ripe.
[History]
A naturalized plant discovered in Shiga in 1952.
