Perforate St John's-wort - Hypericum perforatum

    Description

    Short to tall, hairless, erect plant. Stems round with 2 raised lines, spreading and rooting at the base. Leaves opposite, linear to oval, unstalked, with large translucent dots. Flowers yellow, 18 to 22 mm in broad panicles, the petals with numerous black dots, mostly around the edges. Sepals narrow, with or without black glands, much shorter than the petals.

    Similar Species

    Other St.John's-worts

    See our St John's Wort ID Guide.

    Identification difficulty
    ID guidance

    Stem with 2 ridges; leaves with translucent glands (hold the leaf up to the light); sepals equal; some black glands on petals, sepals and leaves

    Recording advice

    A photo of the plant in its habitat and confirmation that leaves have translucent glands

    Habitat

    Rough grassland, road verges and hedgebanks.

    When to see it

    May to September.

    Life History

    Perennial.

    UK Status

    Common throughout much of Britain, but rare in central and northern Scotland.

    VC55 Status

    Common in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 305 of the 617 tetrads.

    Leicestershire & Rutland Map

    UK Map