Species in the genus Plantago:

Plantago asiatica / Oobako
Plantago camtschatica / Ezooobako
Plantago lanceolata / Heraoobako
Plantago major. var. japonica / Touoobako
　

Plantago major. var. japonica / Touoobako トウオオバコ

Plantago major. var. japonica is a perennial herb inhabiting seashores, and the whole is significantly larger than another species, Plantago asiatica. Leaves are all radical, somewhat thick, and leathery, with blades measuring 8-25cm in length, 5-18cm in width, in an oval shape, with tips instead of pointed. Racemose inflorescences, 40-80cm long, arise with dense, small flowers from among the leaves. Bloom time: July-August.