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(First upload on November 17 2011. Last on January 1 2022) [ 日本語 | English ]

Hypericum L. (オトギリソウ) H. perforatum L. Seiyou-otogirisou (セイヨウオトギリ, 西洋弟切, s.l.), (common) St. John's wort Lifeform: deciduous perennial forb < 100 cm high, branching well Distribution: native to Europe, western Asia, and North Africa (exotic to Japan) Habitat: pastures, meadows, and rangelands in the native regions Leaf: translucent dots or pale glands (and no dark glands) Varieties (often not adopted)

ssp. chinense N.Robson (コゴメバオトギリ) Distribution: native to Europe Leaf: < 12-14 mm long and < 5 mm wide, shortly-stipitate Stem: frequently branching (↔ natives = erect) Flower: dark glands on the margin Chromosome number: 2n = 32, or 48 Synonyms: - var. angustifolium auct. non DC. ssp. perforatum (セイヨウオトギリ, s.s.) Leaf: > 20 mm long and > 10 mm wide

Hypericum perforatum in the Northern Hemisphere

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[1-3] under a street tree at N28/E3, East Ward, Sapporo, on July 22 2015. [4] along a paved road in N11/W4, North Ward, Sapporo, on July 15 2016. [5] in a grassland developed on an abondoned parking lot at N21/E1, East Ward, Sapporo, on July 19 2011. [6] at MAX PSU South Station, Portland, Oregon, on August 8 2017. [7] within a flower garden along a paved road in N12/W5, North Ward, Sapporo, on October 6 2021.