Top
Header

(First upload on November 17 2011. Last on December 28 2017) [ 日本語 | English ]

Hypericum perforatum L.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

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: many 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: < 15 mm long and < 5 mm wide, shortly-stipitate
Stem: frequently branching (↔ natives = erect)
Leaf: 12-14 mm long
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
索引

Hypericum perforatum in the Northern Hemisphere


ST1 ST2 ST3
ST4 ST5 ST6
[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.

フッター