1. Fruit (0.7–) 1–1.4 (–1.8) cm long, on pedicels less than 4 mm long, even when young closely appressed to axis of inflorescence; seeds 10–20 per fruit.
1. Fruit (2–) 3–8 (–10) cm long, on pedicels at least 6 mm long, spreading; seeds 40–120 per fruit.
2. Fruiting pedicel as thick as fruit; uppermost leaves pinnatisect into narrowly linear to filiform lobes to 2 mm wide.
2. Fruiting pedicel narrower than fruit; uppermost leaves entire or pinnately lobed but with wider segments.
3. Petals 2–3.5 (–5) mm long; flowers and buds overtopped by ends of uppermost young fruit.
3. Petals 6–8 mm long; flowers and buds barely if at all surpassed by tips of fruit.
All species found in Sisymbrium
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 28, 2017. http://michiganflora.net/genus.aspx?id=Sisymbrium.