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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

SISYMBRIUM
Annual [to perennial herb]; hairs simple or 0. Leaf: basal rosetted or not, petioled, simple, entire, dentate, or pinnately lobed; cauline petioled or sessile, base not lobed. Inflorescence: elongated. Flower: sepals erect to spreading, lateral pair generally not sac-like at base, tips horned or not; petals yellow [white, pink], clawed. Fruit: silique, dehiscent, linear or awl-shaped, cylindric, unsegmented; stigma 2-lobed. Seed: 6–160, in 1 row, wingless.
41 species: North America, Eurasia, northern and southern Africa. (Greek: for various mustards) [Warwick & Al-Shehbaz 2003 Novon 13:265–267]

Key to Sisymbrium

1. Fruit narrowly awl-shaped, (0.7)1–1.4(1.8) cm, appressed to rachis; seeds 10–20 ..... S. officinale

1' Fruit narrowly linear, (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 (4)6–10(13) mm ..... S. altissimum

4' Distal-most leaves generally simple, 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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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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