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Hypericum tetrapterum Fr.

Square-Stalked St John's-Wort

Hypericaceae

Taxonomy

Classification

Group: Spermatophytina (Spermatophytes)
Family: Hypericaceae (St. John's Wort family)
Genus: Hypericum (St. John's Wort)

Synonyms

Hypericum tetrapterum
Hypericum acutum
Hypericum acutum Moench subsp.
Hypericum acutum subsp. corsicum
Hypericum acutum subsp. tetrapterum
Hypericum acutum var. anagallidioides
Hypericum anagallidioides
Hypericum corsicum
Hypericum neapolitanum
Hypericum quadrangulum
Hypericum quadrangulum L. subsp.
Hypericum tenellum
Hypericum tetrapterum subsp. corsicum

Related species

Hypericum perforatum L. - Perforate St John's-Wort
Hypericum maculatum Crantz - Imperforate St John's-Wort
Hypericum dubium Leers - Spotted St John's-Wort
Hypericum majus (A. Gray) Britton - Large St John's-Wort
Hypericum tetrapterum Fr. - Square-Stalked St John's-Wort
Hypericum humifusum L. - Trailing St John's-Wort
Hypericum pulchrum L. - Slender St John's-Wort
Hypericum elegans Willd. - Graceful St John's-Wort
Hypericum montanum L. - Pale St John's-Wort
Hypericum hirsutum L. - Hairy St John's-Wort
Hypericum elodes L. - Marsh St John's-Wort

Traits


    <span class="r">Toxic</span>, 30&#8211;60&#8239;cm tall. <span class="v1">flowers:</span> yellowish; petals <b>without <i>or</i> with less than 5 black glands</b>. <span class="v1">petals:</span> <b>5&#8211;8&#8239;mm long</b>, distinctly longer than the sepals. <spa...

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Distribution

Distribution in Europe


Hypericum tetrapterum

Legend

The colours represent the floristic status of the species in the respective region. Green indicates native occurrences, light green naturalized occurrences. Adventive occurrences are represented by light yellow shades and plants that are cultivated (but rarely occur in the wild) are dark yellow. Grey colours are used, if the floristic status of species is unknown or uncertain.


Distribution in Germany

Hypericum tetrapterum

Legend

Natural, established occurences
Artificial occurences

The color intensity reflects the species' abundance

Data: Floristische Kartierung Deutschlands (Stand 2013), Bundesamt für Naturschutz (www.floraweb.de)

Ecology

Hypericum tetrapterum

Hypericum tetrapterum

Status

  • native

Habitat

  • riparian vegetation, mudflat vegetation, reedbeds, perennial herbaceous vegetation, forests, shrubbery

  • in moist to wet, periodically flooded habitats

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