(Common) St. John's wort
Hypericum perforatum L. [Hypericaceae]
Seiyou-otogirisou (セイヨウオトギリソウ, 西洋弟切草)
Lifeform: deciduous perennial forb < 100 cm high
Distribution: native to Europe, western Asia, and North Africa (exotic to Japan)
Habitat: pastures, meadows, and rangelands in the native regions
Leaf: many translucent dots on the leaves
Varieties (not adopted recently)
subsp. chinense N.Robson (コゴメバオトギリ)
subsp. perforatum (セイヨウオトギリ)
Hypericum perforatum in Hokkaido
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[1] a grassland developed on an abondoned parking lot. [3] leaves on a shoot. [1-4] At N21/W1, West Ward, Sapporo, on July 19 2011.