Sisymbrium erysimoides Desf., Brassicaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: smooth mustard

Habit:  herb

Description:  "Annual herbs. Stems erect, 20-50 cm high, covered with simple, spreading hairs. Basal leaves petiolate, lyrate-pinnatifid with 3-4 pairs of oblong, dentate, lobes, not rosette-forming; cauline leaves shortly petiolate, lyrate-pinnatifid. Flowers small and half the size of those of S. irio. Calyx somewhat spreading, petals ca 2 x 1 mm, narrowly spathulate, pale yellow. Fruiting pedicels more or less spreading, siliqua erect-spreading, 20-35 mm long, ca 1 mm broad, usually broader at base than apex, horizontal, glabrous. Valves thin, more or less torulose, 1-nerved. Style very short" (Daoud, 1985; pp. 101-102).

Habitat/ecology:  Sandy soil (Daoud, 1985; pp. 101-102).

Propagation:  Seed

Native range:  Mediterranean Europe, Iraq, Syria, Palestine, Jordan, Egypt, Arabia, Caucasus, Iran, Pakistan, North Africa, Macaronesia (Daoud, 1985; pp. 101-102).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
New Caledonia New Caledonia	New Caledonia Islands		Swarbrick, John T. (1997) (p. 97)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced invasive	Tassin, Jacques (2005)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced	MacKee, H. S. (1994) (p. 45) Vouchers cited: Administration pénitentiaire 152, Schmid 702 (NOU)

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia Australia (continental)	Australia (continental)	introduced	Daoud, H. S. (1985) (pp. 101-102)
New Zealand New Zealand	New Zealand (country)	introduced	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 445) Collected once in a railway yard in Christchurch, present status unknown.

Additional information:
Additional online information about Sisymbrium erysimoides is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Sisymbrium erysimoides as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Sisymbrium erysimoides may be available from the Germplasm Resources Information Network (GRIN).

References:

Daoud, H. S. 1985. Flora of Kuwait. Vol. one: dicotyledoneae. Rev. by A. Al-Rawi.

MacKee, H. S. 1994. Catalogue des plantes introduites et cultivées en Nouvelle-Calédonie. Muséum National d'Histoire Naturelle, Paris, 164 p.

Porcher, Michel H. 2011. Searchable World Wide Web Multilingual Multiscript Plant Name Database. The University of Melbourne, Australia. Online resource.

Swarbrick, John T. 1997. Weeds of the Pacific Islands. Technical paper no. 209. South Pacific Commission, Noumea, New Caledonia. 124 pp.

Tassin, Jacques. 2005. Jacques Tassin (IAC-CIRAD), personal communication.

Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. 1988. Flora of New Zealand, Volume IV: Naturalised pteridophytes, gymnosperms, dicotyledons. Botany Division, DSIR, Christchurch. 1365 pp.