Key to Sisymbrium

View taxon page for Sisymbrium

(For a list of species in Sisymbrium, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Fruit narrowly awl-shaped, (0.7)1–1.4(1.8) cm, 

appressed 

Parallel or nearly parallel to and often in contact with surface of origin; used to describe the disposition of hairs, leaves, pedicels, etc.

to 

rachis 

In ferns, primary axis of a compound or dissected frond blade.

; seeds 10–20 ..... S. officinale

1' Fruit narrowly 

linear 

Elongate, with nearly parallel sides; narrower than elliptic or oblong.

, (1.7)3–14 cm, not appressed to rachis; seeds 30–140

2. Pedicels narrower than fruit

3. Young fruit overtopping flowers; petals 2.5–3.5(4) mm; plants glabrous or sparsely hairy ..... S. irio

3' Young fruit not overtopping flowers; petals 6–8 mm; plants generally densely hairy at least proximally ..... S. loeselii

2' Pedicels ± as thick as fruit

4. Distal-most leaves finely pinnately divided into linear to thread-like segments; sepals horned; 

pedicels 

Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.

(4)6–10(13) mm ..... S. altissimum

4' Distal-most leaves generally 

simple 

Composed of a single part; undivided; unbranched.

, if lobed then not finely pinnately divided into linear segments; sepals not horned; pedicels 1–6 mm

5. Pedicels 1–2(3) mm; petals 1.4–2.5 mm; seeds 30–46(54) ..... S. erysimoides

5' Pedicels 3–6 mm; petals (6)7–9(10) mm; seeds (60)80–100(140) ..... S. orientale

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