Bromus hordeaceus: info from PIER (PIER species info)

Pacific Island Ecosystems at Risk (PIER)

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Bromus hordeaceus
L., Poaceae

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Present on Pacific Islands? yes

Primarily a threat at high elevations? no

Other Latin names: Bromus mollis L.

Common name(s): [more details]

Chinese: mao que mai

English: barley brome, common soft brome, least soft brome, lop grass, sand soft brome, soft brome, soft chess

French: brome mou

Spanish: bromo blando, bromo suelto

Habit: grass

Description: "Annuals; culms 1.5-6.5 (-10) dm tall, glabrous or pubescent, sometimes only on nodes. Sheaths soft pubescent; ligule 0.5-2 mm long, finely erose-ciliate, pubescent or sometimes glabrous; blades flat, relatively narrow, 1.5-4 mm wide, sometimes involute, upper surface glabrous, lower surface with scattered hairs, auricles absent. Inflorescences paniculate, crowded, erect, 3-8 (-10) cm long, pedicels usually shorter than spikelets; spikelets 5-10 (-12)-flowered, (11-) 14-20 (-23) mm long, soft pubescent to glabrous; first glume lanceolate, 5-7.5 mm long, 3-5-nerved, second glume ovate to lanceolate, 6-8.5 mm long, 5-7-nerved; lemmas 7-9 (-10) mm long, 1.5-2.5 mm wide in side view, somewhat flattened, nerves relatively prominent, apex bifid, the teeth usually less than 2 mm long; awns 4-9 mm long, usually straight; palea about as long as lemma, 2-nerved, ciliate on the nerves, delicately membranous, adhering to caryopsis. Caryopsis dark brown, flattened, slightly curved, thin, linear to oblong, 5-6 mm long, 1-1.5 mm wide" (Wagner et al., 1999; pp. 1507-1508).

Description from GrassBase.

Habitat/ecology: In Hawai‘i, "naturalized in disturbed, often dry areas such as pastures and along roadsides and trails, 610-2290 m" (Wagner et al., 1999; p. 1508).

Propagation: Seed

Native range: Old World (Wagner et al., 1999; p. 1508).

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. 22)
"A weedy grass native to Europe and western Asia". Voucher cited: A.C. Beauglehole 5429 (CANB, MEL)

Australia (Pacific offshore islands)
Norfolk Islands Norfolk Island introduced
invasive
Orchard, Anthony E., ed. (1994) (p. 12)
"A weedy grass native to Europe and western Asia". Vouchers cited: P.S. Green 1508 (A, K), W.R. Sykes 766/87 (CHR), E. Ralston 49 (CHR)

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
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)

Chile (offshore islands)
Juan Fernández Islands Isla Más Afuera (Alejandro Selkirk Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)

Chile (offshore islands)
Juan Fernández Islands Isla Más Afuera (Alejandro Selkirk Island) introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)

Chile (offshore islands)
Juan Fernández Islands Isla Santa Clara introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)

Chile (offshore islands)
Juan Fernández Islands Isla Santa Clara introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)

State of Hawaii
Hawaiian Islands Hawai‘i (Big) Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1507-1508)

State of Hawaii
Hawaiian Islands Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1507-1508)
Voucher cited: Rock 5128 (BISH)

State of Hawaii
Hawaiian Islands Maui Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1505-1506, 1507-1508, 1905)
Also subsp. molliformis (Lloyd) Maire & Weiler; voucher cited: Lee 288 (BISH)

State of Hawaii
Hawaiian Islands Moloka‘i Island introduced
invasive
Wysong, Michael/Hughes, Guy/Wood, K. R. (2007) (p. 6)
Ssp. hordeaceus. Voucher cited: K.R. Wood & Hughes 10600.001 (PTBG)

State of Hawaii
Hawaiian Islands O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1505-1506, 1507-1508, 1905)
Also subsp. molliformis (Lloyd) Maire & Weiler

New Zealand (offshore islands)
Kermadec Islands Kermadec Islands introduced
invasive
Edgar, E./Connor, H. (2000) (p. 363)
"Roadsides and waste land".

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)
Naturalized

British Columbia (province of Canada)
Province of British Columbia Canada (British Columbia) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

China
China China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Gansu, Hebei, Qinghai, Xinjiang.

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
Edgar, E./Connor, H. (2000) (p. 363)
"Roadsides 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

Taiwan
Taiwan Island Taiwan Island native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)

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
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)

Control: If you know of control methods for Bromus hordeaceus, please let us know.

Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 10 FEB 2007 and was last updated on 30 NOV 2008.

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. 22) "A weedy grass native to Europe and western Asia". Voucher cited: A.C. Beauglehole 5429 (CANB, MEL)
Australia (Pacific offshore islands) Norfolk Islands	Norfolk Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 12) "A weedy grass native to Europe and western Asia". Vouchers cited: P.S. Green 1508 (A, K), W.R. Sykes 766/87 (CHR), E. Ralston 49 (CHR)
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	Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)
Chile (offshore islands) Juan Fernández Islands	Isla Más Afuera (Alejandro Selkirk Island)	introduced invasive	Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands) Juan Fernández Islands	Isla Más Afuera (Alejandro Selkirk Island)	introduced invasive	Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)
Chile (offshore islands) Juan Fernández Islands	Isla Santa Clara	introduced invasive	Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands) Juan Fernández Islands	Isla Santa Clara	introduced invasive	Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1507-1508)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1507-1508) Voucher cited: Rock 5128 (BISH)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1505-1506, 1507-1508, 1905) Also subsp. molliformis (Lloyd) Maire & Weiler; voucher cited: Lee 288 (BISH)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive	Wysong, Michael/Hughes, Guy/Wood, K. R. (2007) (p. 6) Ssp. hordeaceus. Voucher cited: K.R. Wood & Hughes 10600.001 (PTBG)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1505-1506, 1507-1508, 1905) Also subsp. molliformis (Lloyd) Maire & Weiler
New Zealand (offshore islands) Kermadec Islands	Kermadec Islands	introduced invasive	Edgar, E./Connor, H. (2000) (p. 363) "Roadsides and waste land".

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) Naturalized
British Columbia (province of Canada) Province of British Columbia	Canada (British Columbia)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
China China	China (People's Republic of)	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Gansu, Hebei, Qinghai, Xinjiang.
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	Edgar, E./Connor, H. (2000) (p. 363) "Roadsides 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
Taiwan Taiwan Island	Taiwan Island	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
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 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)