Pacific Island Ecosystems at Risk (PIER)

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Bromus cebadilla
Steud., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Bromus valdivianus Phil.

Common name(s): [more details]

English: grazing brome

Habit:  grass

Description:  "Perennial; caespitose. Culms 50-120 cm long. Lateral branches lacking. Leaf-sheaths pilose. Ligule an eciliate membrane; 2-3 mm long. Leaf-blades 12-30 cm long; 4-7 mm wide. Leaf-blade surface glabrous. Inflorescence a panicle. Panicle open; lanceolate; 15-20 cm long. Spikelets solitary. Fertile spikelets pedicelled. Fertile spikelets: Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; compressed strongly; 20-30 mm long; breaking up at maturity; disarticulating below each fertile floret. Glumes persistent; shorter than spikelet. Lower glume lanceolate; 7-11 mm long; 0.9 length of upper glume; membranous; 1-keeled; 5-7 -veined. Lower glume apex acute. Upper glume lanceolate; 7-13 mm long; 0.75-1 length of adjacent fertile lemma; membranous; 1-keeled; 9 -veined. Upper glume apex acute. Florets: Fertile lemma lanceolate; 10-13 mm long; chartaceous; keeled; 7-9 -veined. Lemma surface pubescent. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 8-12 mm long overall. Apical sterile florets resembling fertile though underdeveloped. Flower: Lodicules 2; membranous. Anthers 3. Ovary with a fleshy appendage above style insertion; pubescent on apex. Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear" (GrassBase).

Habitat/ecology:  In New Zealand, "roadsides and waste ground usually near the coast in areas of low rainfall"  (Edgar & Connor, 2000; p. 367).

Propagation:  Seed

Native range:  Argentina, Chile and Peru; 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
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)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (continental)
Chile
Chile (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Antofagasta, Atacama, Bio-Bio, Coquimbo, La Araucania, Los Lagos, Maule, Valparaiso
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Edgar, E./Connor, H. (2000) (p. 367)
As Bromus stamineus Desv.
Perú
Perú
Perú (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Junin, La Libertad
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Western states.
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)


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

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This page was created on 8 FEB 2011 and was last updated on 21 MAY 2017.