Plants of South Eastern New South Wales
Sisymbrium officinale
Common name
Hedge mustard
Family
Brassicaceae
Where found
Weed of pastures, crops, roadsides, and disturbed sites. Widespread.
Notes
Introduced annual or biennial herb to 0.9 m high, rough with coarse hairs. Basal leaves in a rosette, to 25 cm long but often much shorter, deeply dissected, margins toothed. Stem leaves alternating up the stems, becoming smaller up the stems. Flowers with 4 yellow petals 2–4 mm long. Flowers in branched clusters. Flowers mostly spring. 'Pods' narrow conical, 0.8–2 cm long, 2 mm wide at the base, straight; stalks 1–3 mm long, thick, pointing up or closely appressed to the stem.
No other Brassicaceae in Australia have narrow-conical 'pods' appressed to the stems.
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Sisymbrium~officinale (accessed 7 February, 2021)
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