Square-stalked St John's-wort - Hypericum tetrapterum

    Description

    Short to tall erect hairless plant. Stems square, with four narrow wings, spreading and rooting at the base. Leaves opposite, rounded to oval with translucent dots. Flowers pale yellow, 9 to 10 mm, many in a spreading panicle.

    Similar Species

    Other St.John's-worts

    See our St John's Wort ID Guide.

    Identification difficulty
    ID guidance

    Petals pale yellow; small flowered; stems with 4 broad wings

    Recording advice

    A photo of the plant in its habitat

    Habitat

    Damp places, marshes, pond and river margins.

    When to see it

    June to September.

    Life History

    Perennial.

    UK Status

    Fairly common throughout Britain.

    VC55 Status

    Fairly common in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 310 of the 617 tetrads.

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    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map