Notes For Reference:-

Species in the genus Centaurium:

Centaurium tenuiflorum / Hanahamasenburi

Centaurium tenuiflorum / Hanahamasenburi ハナハマセンブリ

Centaurium tenuiflorum, an annual or biennial originating in the Mediterranean Coast, grows wild in places like vacant lots as tall as 20 centimeters. On-stem leaves are hollow, with four ridges, and branch well at the upper parts. Leaves are of opposite phyllotaxis, in an obovate shape, with entire margins. Radical leaves do not form rosettes. About 8mm in diameter, many pink flowers set themselves on the stem tips; the corollas are divided into five, and the calyx lobes are about half as long as the floral tubes. Bloom time: June-July.