What is "kerria japonica"

Corchorus \Cor"cho*rus\ (k[^o]r"k[-o]*r[u^]s), n. [Nl., fr. L. corchorus a poor kind of pulse, Gr. ko`rchoros a wild plant of bitter taste.] (Bot.) The common name of the Kerria Japonica or Japan globeflower, a yellow-flowered, perennial, rosaceous plant, seen in old-fashioned gardens.

Kerria japonica, the sole species in the genus Kerria, is a deciduous shrub in the rose family Rosaceae, native to China, Japan and Korea. It is named after William Kerr, who introduced the cultivar 'Pleniflora'. The scientific genus name is also used as a common name Kerria.