Sisymbrium officinale tall hedge mustard Brassicaceae SIOF*; Bx, pb; Q, j; R, wp;

Sisymbrium officinale.David G.

Sisymbrium officinale.David G. (Accessed 4/2014).

Sisymbrium officinale is an annual, or winter annual herb; stems erect, to 80 cm tall, from a rosette. 

Leaves alternate, lower rosette leaves deeply pinnately divided, terminal segment largest, rounded, segments irregularly toothed, bristly-hairy on both sides, upper stem leaves with narrow, toothed lobes, stalkless. 

Flowers pale yellow, to 0.6 cm wide, petals 4, blooming from top of stem, fruiting below; blooming May-Sept. 

Fruit dry, capsules 2-parted, linear, to 2 long, 0.1 cm wide, tightly appressed to stems (Uva et al 1997), seeds 10-20. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Eurasia. 

Habitat: Open areas, roadsides, fill. An agricultural weed.