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

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)	New South Wales	introduced invasive	National Herbarium of New South Wales (2013) Naturalized
Australia Australia (continental)	Australia (continental)	introduced invasive	National Herbarium of New South Wales (2013) South Australia, Tasmania, Victoria, Western Australia 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
British Columbia (province of Canada) Province of British Columbia	Canada (British Columbia)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Central America Central America (Pacific rim)	Costa Rica (Republic of)	introduced invasive	U.S. Dept. Agr., Agr. Res. Serv. (2013) Naturalized
Central America Central America (Pacific rim)	Guatemala (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)
Indonesia Indonesia	Indonesia (Republic of)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 152)
Japan Japan	Japan	introduced invasive	U.S. Dept. Agr., Agr. Res. Serv. (2013) Naturalized
Japan Japan	Japan	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".
South America (Pacific rim) South America (Pacific rim)	Chile (Republic of)	introduced invasive	U.S. Dept. Agr., Agr. Res. Serv. (2013) Naturalized
South America (Pacific rim) South America (Pacific rim)	Colombia		Hafliger, Toni J./Wolf, Matthias (1988) (p. 154)
South America (Pacific rim) South America (Pacific rim)	Ecuador (Republic of) (continental)	introduced invasive	U.S. Dept. Agr., Agr. Res. Serv. (2013) Naturalized
South America (Pacific rim) South America (Pacific rim)	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 Canada	Canada	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)

Control:  If you know of control methods for Capsella bursa-pastoris, please let us know.