Pacific Island Ecosystems at Risk (PIER)

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Capsella bursa-pastoris
(L.) Medik., Brassicaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Thlaspi bursa-pastoris L.

Common name(s): [more details]

Chinese: qi

English: boursette, case weed, lady's purse, pepper plant, shepherd's purse, St. James weed

French: bourse à pasteur, capselle à pasteur

Japanese: nazuna

Korean: naeni

Spanish: bolsa de pastor, calzoncitos, comida de pajaritos, mastuerzo de chivo, mastuerzo de coche, surrón de pastor, yerba de puerco, zurrón de pastor

Habit:  herb

Description:  "Annual herb. Stem erect, little- to much-branched above, (2)-15-30-(80) cm tall. Leaves and stems with spreading simple hairs and sparse to dense appressed stellate hairs. Leaves not lobed to runcinate-pinnatifid, very variable in shape, shallowly dentate or rarely subentire; lower leaves petiolate, (0.4)-5-15 x (0.2)-2-5 cm; upper leaves with sagittate or amplexicaul lobes at base, smaller, becoming entire. Racemes (2)-5-20-(45) cm long; pedicels erecto-patent at flowering, spreading at fruiting. Sepals glabrous or sparsely hairy, green or pinkish, 1-1.5 x 0.6-0.8 mm. Petals white, 2-2.5 x 0.7-1 mm, sometimes reduced or 0. Silicle narrowly to broadly obtriangular, emarginate, 5-10 x 4-7 mm; valves sharply keeled, reticulately veined, greenish brown; style c. 0.5 mm long. Seeds pale brown, c. 1 x 0.5 mm"  (Webb et al., 1988; p. 410).

Habitat/ecology:  In Hawai‘i, "naturalized in disturbed, often dry sites, especially pastures"  (Wagner et al., 1999; p. 402).

Propagation:  Seed

Native range:  "Worldwide weed, origin obscure" (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia (Pacific offshore islands)
Lord Howe Island
Lord Howe Island introduced
invasive
Orchard, Anthony E., ed. (1994) (p. 19)
"A common weed of roadsides, cultivated land or disturbed soil". Vouchers cited: A.N. Rodd NSW123154 (K, NSW), C. Moore 49 (K)
Australia (Pacific offshore islands)
Norfolk Islands
Norfolk Island introduced
invasive
Orchard, Anthony E., ed. (1994) (p. 8)
"A common weed of roadsides, cultivated land or disturbed soil". Voucher cited: P. Ralston 63 (A, K)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
cultivated
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (pp. 477, 523, 552)
Voucher cited: Danton I(5/114)1465. "En RC, es una adventicia que se introdujo probablemente con las importaciones de forraje que se desarrollaron sin control sanitario estos últimos años. La encontramos en varios sitios del pueblo de San Juan Bautista a partir de los cuales, ciertamente, se va extender".
Ecuador (Galápagos Islands)
Floreana Group
Floreana Island introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Isabela Group
Isabela Island introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Sierra Negra, Isabela Island introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
San Cristóbal Group
San Cristóbal Island introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island introduced
invasive
Charles Darwin Foundation (2008)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 402)
Voucher cited: Rock 8322 (BISH)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 402)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 402)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 402)
Japan (offshore islands)
Ogasawara (Bonin) Islands
Bonin (Ogasawara) Islands   Kato, Hidetoshi (2007)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
MacKee, H. S. (1994) (p. 44)
Voucher cited: Bougier 98
New Zealand (offshore islands)
Kermadec Islands
Kermadec Islands introduced
invasive
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 410)
"Common weed of cultivated and waste land".
Philippines
Philippine Islands
Philippine Islands   Hafliger, Toni J./Wolf, Matthias (1988) (p. 152)
Philippines
Philippine Islands
Philippine Islands introduced
invasive
Merrill, Elmer D. (1923) (p. 208)
Collected once in Baguio, but apparently occurs there only as a casual plant.
United States (other Pacific offshore islands)
Midway Atoll
Sand Island introduced
invasive
Herbst, Derral R./Wagner, Warren L. (1996) (p. 10)
Voucher cited: Herbst & Takeuchi 9087 (BISH)
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
National Herbarium of New South Wales (2013)
South Australia, Tasmania, Victoria, Western Australia
Naturalized
Australia
Australia (continental)
New South Wales introduced
invasive
National Herbarium of New South Wales (2013)
Naturalized
Australia
Australia (continental)
Northern Territory introduced
invasive
National Herbarium of New South Wales (2013)
Naturalized
Australia
Australia (continental)
Queensland introduced
invasive
National Herbarium of New South Wales (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, gardens, fields, waste areas, mountain slopes".
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 110)
Colombia
Colombia
Colombia (Republic of)   Hafliger, Toni J./Wolf, Matthias (1988) (p. 154)
Costa Rica
Costa Rica
Costa Rica (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Guatemala
Guatemala
Guatemala (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Indonesia
Indonesia
Indonesia (Republic of)   Hafliger, Toni J./Wolf, Matthias (1988) (p. 152)
Japan
Japan
Japan (country) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
South Korea
South Korea
South Korea (Republic of) introduced
invasive
cultivated
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
invasive
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 410)
"Common weed of cultivated and waste land".
Perú
Perú
Perú (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Taiwan
Taiwan Island
Taiwan Island   Hafliger, Toni J./Wolf, Matthias (1988) (p. 154)
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)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
La Réunion (France)
La Réunion Island
La Réunion Island introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
La Réunion (France)
La Réunion Island
La Réunion Island   Hafliger, Toni J./Wolf, Matthias (1988) (p. 154)
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
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)
Throughout the rest of the U.S.
United States (continental except west coast)
United States (other states)
USA (Florida) 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 5 NOV 2011.