Pott ex Link, Poaceae |
Present on Pacific Islands? yes
Primarily a threat at high elevations? no
Common name(s): [more details]
English: Yatheroo oat, barbed oat, bearded oat, slender oat, slender wildoat |
French: avione barbue, avoine à deux barbes |
Spanish: avena barbada, balango, ballueca, cebada de perro, cebadilla |
Habit: grass
Description: "Tufts green to dark green, often very slender, 65-100-(170) cm, erect or drooping above in taller plants. Leaf-sheath smooth, or slightly scabrid above, occasionally red-tinged. Ligule 2.7-5-(9) mm, obtuse, denticulate, abaxially finely scabrid. Leaf-blade 12.5-30 cm x 2-8 mm, finely scabrid on ribs and margins. Culm internodes glabrous. Panicle (12)-18-40 cm, very lax, equilateral; rachis smooth, branches and pedicels very filiform, finely scabrid. Spikelets 40-50 mm, 2-(3)-flowered; disarticulation below each floret at maturity. Glumes 7-9-nerved. Lemma 12-18 mm, narrow-lanceolate, light brown, with long stiff reddish hairs below level of awn insertion, green and scabrid above, each lobe-tip produced to a fine bristle (2-3 mm); lemmas awned, awns 30-36 mm, geniculate, column very dark brown, twisted. Palea keels with 1-2 rows of cilia, interkeel glabrous, flanks sometimes sparsely scabrid. Callus long hairy, with horse-shoe shaped scar. Rachilla long hairy. Anthers 2-3 mm. Caryopsis 5-7 x 0.8-1.3 mm, light brown, silky hairy" (Edgar & Connor, 2000; p. 302).
Description from GrassBase.
Habitat/ecology: In New Zealand, "near the sea, especially on cliffs, dry banks, and steep grassy slopes, occasionally inland on disturbed ground, roadsides and in pasture" (Edgar & Connor, 2000; p. 302).
Propagation: Seed
Native range: Macaronesia, northern Africa, Europe, Asia; also cultivated and naturalized (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. 11)
"A weed of disturbed soil". Voucher cited: R.D. Hoogland 8657 (CANB) |
Chile (offshore islands)
Juan Fernández Islands |
Isla Más a Tierra (Robinson Crusoe Island) |
introduced
|
Skottsberg, Carl (1953) (p. 215)
Very common in the basal region, abundant in the dry western parts. |
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
|
Skottsberg, Carl (1953) (p. 215)
East coast. |
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
|
Skottsberg, Carl (1953) (p. 215) |
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) |
Chile (offshore islands)
Juan Fernández Islands |
Morro El Verdugo |
introduced
invasive |
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551) |
Chile (offshore islands)
Juan Fernández Islands |
Morro Juanango |
introduced
invasive |
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551) |
State of Hawaii
Hawaiian Islands |
Hawaii (Big) Island |
introduced
invasive |
Staples, George W./Imada, Clyde T./Herbst, Derral R. (2002) (p. 13)
Voucher cited: L. W. Cuddihy 238 (BISH) |
State of Hawaii
Hawaiian Islands |
Oahu Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1499)
Voucher cited: Hitchcock 13934 (US) |
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 |
Japan
Japan |
Japan |
introduced
|
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 192) |
New Zealand
New Zealand |
New Zealand (country) |
introduced
invasive |
Edgar, E./Connor, H. (2000) (p. 302) |
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) |
Perú (Republic of) |
introduced
invasive |
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized |
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 |
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 Avena barbata, please let us know.