Eastern Rocket - Sisymbrium orientale

    Description

    A tall, branched weed with long (up to 12 cm) narrow pods. The lower rosette leaves are deeply lobed, but the degree to which the leaf is lobed decreases up the stem. The upper leaves are unlobed. All leaves have a distinct petiole. The stems, leaves and pods are slightly hairy with unbranched hairs. The flowers are yellow, with petals about twice the length of the sepals.

    Similar Species

    other Sisymbrium

    Identification difficulty
    ID guidance

    Seed-pods long and sticking out from stem, without beak, splitting into 2 valves with one row of seeds in each valve; lowest leaves lobed, upper stem-leaves divided but not pinnate; fruit pedicels a lot narrower than ripe fruit, lower part of stem with stiff hairs.  

    Recording advice

    Photos of leaves (basal and stem leaves) and ripe fruit

    Habitat

    A weed of wasteland and waste places, frequently found growing out of the cracks in city streets.

    When to see it

    In flower during June, July and August.

    Life History

    Annual.

    UK Status

    Occasional plant that is widely scattered over much of Britain

    VC55 Status

    Occasional in Leicestershire and Rutland where it is most often found in built up areas. In the 1979 Flora survey of Leicestershire it was found in 27 of the 617 tetrads.

    In the current checklist (Jeeves 2011) is is Alien, neophyte, occasional

    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map