Pacific Island Ecosystems at Risk (PIER)

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Bromus berteroanus
Colla, Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Bromus trinii E. Desv.

Common name(s): [more details]

English: Chilean chess

Habit:  grass

Description:  "Perennial. Culms 10-80 cm long. Leaf-sheaths pilose. Ligule an eciliate membrane. Leaf-blades 5-20 cm long; 2-5 mm wide. Inflorescence a panicle. Panicle open, or contracted; lanceolate, or oblong; dense; 5-15 cm long. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; scaberulous.  Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets elliptic, or oblong; laterally compressed; 13-22 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent; obtuse; disarticulating obliquely. Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 4-8 mm long; 0.3-0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; muticous, or awned; 1 -awned. Lower glume awn 0-2 mm long. Upper glume lanceolate; 10 mm long; 0.7-0.8 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 2-3 mm long. Florets: Fertile lemma elliptic; 10-12 mm long; chartaceous; keeled; 7 -veined. Lemma apex lobed; 2 -fid; incised 0.25 of lemma length; acuminate; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 9-15 mm long overall; with twisted column. Palea lanceolate; 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped. Ovary with a fleshy appendage above style insertion; pubescent on apex. Caryopsis with adherent pericarp; hairy at apex; apex fleshy"  (GrassBase - The Online World Grass Flora).

Habitat/ecology:  (no habitat/ecology info known by PIER)

Propagation:  Seed

Native range:  Western United States, Argentina, Chile (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 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)
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)
United States (west coast)
United States (west coast states)
USA (Oregon) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) native
U.S. Dept. Agr., Agr. Res. 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
United States (continental except west coast)
United States (other states)
United States (other states) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Arizona, Colorado, Nevada


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

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This page was created on 15 DEC 2010 and was last updated on 7 MAR 2013.