Edit History
Sisymbrium [family CRUCIFERAE]
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 7,
Names
Sisymbrium [family CRUCIFERAE], Sp. Pl., 2: 657. 1753
Chamaeplium [family ], Gen. Pl. ed., 5, 296. 1754
Norta [family ]
Pachypodium [family ]
Schoenocrambe [family CRUCIFERAE]
Velarum [family ]
Treatment Author(s)
Ihsan A. Al-Shehbaz
Information
Plants not scapose; pubescent or glabrous. Stems often erect, sometimes ascending, rarely subprostrate or decumbent, often branched distally, sometimes unbranched. Leaves basal and cauline; petiolate or sessile; basal rosulate or not, petiolate, blade margins dentate, sinuate, lyrate, runcinate, or pinnately lobed [entire]; cauline similar to basal, (blade smaller distally). Racemes (several-flowered), often considerably elongated in fruit. Fruiting pedicels ascending, divaricate, or erect, slender or stout (sometimes as wide as fruit). Flowers: sepals ovate or oblong, (glabrous or pubescent); petals yellow, obovate, spatulate, oblong, or suborbicular, (longer than sepals), claw differentiated from blade, (subequaling or longer than sepals, apex obtuse or emarginate); stamens tetradynamous; filaments not dilated basally; anthers oblong, (apex obtuse); nectar glands confluent, subtending bases of stamens, median glands present. Fruits usually sessile, rarely shortly stipitate (gynophore to 1 mm), usually linear, rarely lanceolate or subulate, smooth or torulose; valves each with prominent midvein and 2 conspicuous marginal veins, usually glabrous, rarely pubescent; replum rounded; septum complete; style subclavate [clavate, conical, cylindrical]; stigma capitate (lobes not decurrent). Seeds plump, not winged, oblong [ovoid]; seed coat (reticulate or papillate), not mucilaginous when wetted; cotyledons incumbent. x = 7.
Distribution
North AmericaEuropeAsiaAfricaintroduced in Central AmericaSouth AmericaAustralia.
Discussion
All except one of the eight species of Sisymbrium in North America are introduced Eurasian weeds. Sisymbrium linifolium (Nuttall) Nuttall was retained in Sisymbrium by both E. B. Payson (1922) and O. E. Schulz (1924). Greene took that species as the type of his genus Schoenocrambe. R. C. Rollins (1982b, 1993) maintained Schoenocrambe and (1993) recognized Sisymbrium auriculatum as the only native North American species of the genus. Molecular studies (S. I. Warwick et al. 2002, 2005) clearly demonstrated that Schoenocrambe should be united with Sisymbrium, that S. linifolium is most closely related to the Eurasian S. polymorphum (Murray) Roth (as was suggested by both Payson and Schulz), that 40 of the 41 species of Sisymbrium are native to the Old World, and that S. auriculatum is a member of the New World Thelypodieae and is unrelated to Sisymbrium. See also Warwick and I. A. Al-Shehbaz (2003) and Al-Shehbaz (2005).
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 7,
Names
Sisymbrium [family CRUCIFERAE], Sp. Pl., 2: 657. 1753
Chamaeplium [family ], Gen. Pl. ed., 5, 296. 1754
Norta [family ]
Pachypodium [family ]
Schoenocrambe [family CRUCIFERAE]
Velarum [family ]
Treatment Author(s)
Ihsan A. Al-Shehbaz
Information
Plants not scapose; pubescent or glabrous. Stems often erect, sometimes ascending, rarely subprostrate or decumbent, often branched distally, sometimes unbranched. Leaves basal and cauline; petiolate or sessile; basal rosulate or not, petiolate, blade margins dentate, sinuate, lyrate, runcinate, or pinnately lobed [entire]; cauline similar to basal, (blade smaller distally). Racemes (several-flowered), often considerably elongated in fruit. Fruiting pedicels ascending, divaricate, or erect, slender or stout (sometimes as wide as fruit). Flowers: sepals ovate or oblong, (glabrous or pubescent); petals yellow, obovate, spatulate, oblong, or suborbicular, (longer than sepals), claw differentiated from blade, (subequaling or longer than sepals, apex obtuse or emarginate); stamens tetradynamous; filaments not dilated basally; anthers oblong, (apex obtuse); nectar glands confluent, subtending bases of stamens, median glands present. Fruits usually sessile, rarely shortly stipitate (gynophore to 1 mm), usually linear, rarely lanceolate or subulate, smooth or torulose; valves each with prominent midvein and 2 conspicuous marginal veins, usually glabrous, rarely pubescent; replum rounded; septum complete; style subclavate [clavate, conical, cylindrical]; stigma capitate (lobes not decurrent). Seeds plump, not winged, oblong [ovoid]; seed coat (reticulate or papillate), not mucilaginous when wetted; cotyledons incumbent. x = 7.
Distribution
North AmericaEuropeAsiaAfricaintroduced in Central AmericaSouth AmericaAustralia.
Discussion
All except one of the eight species of Sisymbrium in North America are introduced Eurasian weeds. Sisymbrium linifolium (Nuttall) Nuttall was retained in Sisymbrium by both E. B. Payson (1922) and O. E. Schulz (1924). Greene took that species as the type of his genus Schoenocrambe. R. C. Rollins (1982b, 1993) maintained Schoenocrambe and (1993) recognized Sisymbrium auriculatum as the only native North American species of the genus. Molecular studies (S. I. Warwick et al. 2002, 2005) clearly demonstrated that Schoenocrambe should be united with Sisymbrium, that S. linifolium is most closely related to the Eurasian S. polymorphum (Murray) Roth (as was suggested by both Payson and Schulz), that 40 of the 41 species of Sisymbrium are native to the Old World, and that S. auriculatum is a member of the New World Thelypodieae and is unrelated to Sisymbrium. See also Warwick and I. A. Al-Shehbaz (2003) and Al-Shehbaz (2005).
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 7,
Names
Sisymbrium [family CRUCIFERAE], Sp. Pl., 2: 657. 1753
Chamaeplium [family ], Gen. Pl. ed., 5, 296. 1754
Norta [family ]
Pachypodium [family ]
Schoenocrambe [family CRUCIFERAE]
Velarum [family ]
Treatment Author(s)
Ihsan A. Al-Shehbaz
Information
Plants not scapose; pubescent or glabrous. Stems often erect, sometimes ascending, rarely subprostrate or decumbent, often branched distally, sometimes unbranched. Leaves basal and cauline; petiolate or sessile; basal rosulate or not, petiolate, blade margins dentate, sinuate, lyrate, runcinate, or pinnately lobed [entire]; cauline similar to basal, (blade smaller distally). Racemes (several-flowered), often considerably elongated in fruit. Fruiting pedicels ascending, divaricate, or erect, slender or stout (sometimes as wide as fruit). Flowers: sepals ovate or oblong, (glabrous or pubescent); petals yellow, obovate, spatulate, oblong, or suborbicular, (longer than sepals), claw differentiated from blade, (subequaling or longer than sepals, apex obtuse or emarginate); stamens tetradynamous; filaments not dilated basally; anthers oblong, (apex obtuse); nectar glands confluent, subtending bases of stamens, median glands present. Fruits usually sessile, rarely shortly stipitate (gynophore to 1 mm), usually linear, rarely lanceolate or subulate, smooth or torulose; valves each with prominent midvein and 2 conspicuous marginal veins, usually glabrous, rarely pubescent; replum rounded; septum complete; style subclavate [clavate, conical, cylindrical]; stigma capitate (lobes not decurrent). Seeds plump, not winged, oblong [ovoid]; seed coat (reticulate or papillate), not mucilaginous when wetted; cotyledons incumbent. x = 7.
Distribution
North AmericaEuropeAsiaAfricaintroduced in Central AmericaSouth AmericaAustralia.
Discussion
All except one of the eight species of Sisymbrium in North America are introduced Eurasian weeds. Sisymbrium linifolium (Nuttall) Nuttall was retained in Sisymbrium by both E. B. Payson (1922) and O. E. Schulz (1924). Greene took that species as the type of his genus Schoenocrambe. R. C. Rollins (1982b, 1993) maintained Schoenocrambe and (1993) recognized Sisymbrium auriculatum as the only native North American species of the genus. Molecular studies (S. I. Warwick et al. 2002, 2005) clearly demonstrated that Schoenocrambe should be united with Sisymbrium, that S. linifolium is most closely related to the Eurasian S. polymorphum (Murray) Roth (as was suggested by both Payson and Schulz), that 40 of the 41 species of Sisymbrium are native to the Old World, and that S. auriculatum is a member of the New World Thelypodieae and is unrelated to Sisymbrium. See also Warwick and I. A. Al-Shehbaz (2003) and Al-Shehbaz (2005).
![Sisymbrium [family CRUCIFERAE]](/fsi/img/misc/plants/static_thumbs/flora_north_america_icon96.jpg)
╳
We're sorry. You don't appear to have permission to access the item.
Full access to these resources typically requires affiliation with a partnering organization. (For example, researchers are often granted access through their affiliation with a university library.)
If you have an institutional affiliation that provides you access, try logging in via your institution
Have access with an individual account? Login here
If you would like to learn more about access options or believe you received this message in error, please contact us.