Pacific Island Ecosystems at Risk (PIER)

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Descurainia sophia
(L.) Sm., Brassicaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  yes

Other Latin names:  Sisymbrium sophia L.

Common name(s): [more details]

Chinese: bo niang hao

English: flaxweed tansy mustard, flixweed, flixweed tansymustard, herb Sophia, pinnate tansymustard, tansy mustard

French: sagesse des chirurgiens, sisymbre sagesse, sisymbre sophia

Japanese: kujira-gusa

Korean: jaessug

Spanish: jacamago, serifio absintio, sofia de cirujanos

Habit:  herb

Description:  "Annual herbs, subglabrous to sparsely pubescent, but not glandular pubescent; stems 2-8 dm long, single from the base, branched above.  Basal leaves usually quickly deciduous, 2-3 times pinnately compound, the segments sometimes toothed; cauline leaves similar, thesegments usually linear, sometimes elliptic to obovate.  Flowers in elongated, loose racemes, fruiting pedicels 7-15 mm long; sepals erect, narrowly elliptic to linear; petals yellowish green.  Siliques terete, usually torulose and curved, occasionally straight, 21-3 cm long.  Seeds in 1 row per cell, oblong-ellipsoid, 0.8-1.5 mm long"  (Wagner et al., 1999; p. 405).

Habitat/ecology:  "Flixweed tansymustard occurs in open-canopy, disturbed sites. It is particularly common in washes and on roadsides, railroad rights-of-way, waste grounds, old fields, and early seral burns. It grows in a variety of mineral soils including loam, silty clay, and sand, where it is most common. It tolerates dry soil, but is not salt tolerant"  (Fire Effects Information System).  "Roadsides, waste places, disturbed sites, railroad embankments, hillsides, mountain slopes, canyon bottoms, stream banks, fields, lawns, pastures, deserts, sagebrush and pinyon-juniper communities; 0-3000 m"  (Flora of North America online).

Propagation:  Seed

Native range:  North Africa and Eurasia; cultivated and naturalized elsewhere (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 405)
Voucher cited: Kawasaki 8 (BISH)
State of Hawaii
Hawaiian Islands
Maui Island introduced
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 405)
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
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Australia
Naturalized
Australia
Australia (continental)
New South Wales introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Canada (British Colombia)
Province of British Columbia
Canada (British Columbia) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Chile (continental)
Chile
Chile (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
China
China
China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
"Roadsides, waste places, disturbed sites, fields, pastures, deserts; near sea level to 4200 m".
Japan
Japan
Japan (country) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Hokkaido, Honshu, Kyushu
Naturalized
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 183)
North Korea
North Korea
North Korea (Democratic People's Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
South Korea
South Korea
South Korea (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Mexico
Mexico
Mexico (United Mexican States) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
New Zealand
New Zealand
New Zealand (country) introduced
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 420)
"Waste places, stock yards, railway yards".
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (Washington) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Canada (except British Colombia)
Canada
Canada (country) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
United States (other states) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)


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This page was created on 3 MAR 2007 and was last updated on 8 APR 2013.