Sisymbrium

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  S. officinale

  1a. Fruiting pedicels erect to appressed, 2–3 mm long [Fig. 529]; siliques subulate in outline, (7–) 10–14 (–18) mm long [Fig. 529]; petals 3–4 mm long
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  1b. Fruiting pedicels spreading to nearly erect, 3–20 mm long [Fig. 528]; siliques linear-cylindric, (20–) 30–100 (–130) mm long [Fig. 528]; petals 6–10 mm long (only 2.5–4 mm in S. irio)
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    2a. Fruiting pedicels nearly as thick as the silique they support [Fig. 528]; mature siliques 30–100 mm long
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      S. altissimum

      3a. Upper stem leaf blades pinnately divided into linear to lanceolate segments; outer sepals corniculate; fruiting pedicels (4–) 6–10 mm long
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      S. orientale

      3b. Upper stem leaf blades simple or hastate (i.e., with 2 outward-pointing basal lobes); outer sepals not corniculate; fruiting pedicels 3–6 mm long
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    2b. Fruiting pedicels slender, thinner than the silique they support; mature siliques 20–40 mm long
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      S. irio

      4a. Immature siliques often overtopping the flowers in the apical portion of the inflorescence; petals 2.5–4 mm long; plants glabrous or sparsely pubescent; mature siliques 30–40 mm long
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      S. loeselii

      4b. Immature siliques not overtopping the flowers in the apical portion of the inflorescence; petals 6–8 mm long; plants sparsely to densely pubescent below; mature siliques 20–35 mm long

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 Show photos of:   Each photo represents one species in this genus.