Pacific Island Ecosystems at Risk (PIER)

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Polypogon australis
Brongn., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Polypogon crinitus Trin.

Common name(s): [more details]

English: Chilean beard grass, Chilean rabbitsfoot grass

Habit:  grass

Description:  "Perennial. Culms 30-120 cm long. Leaf-sheaths smooth, or antrorsely scabrous. Ligule an eciliate membrane; 1.5-3 mm long; erose; truncate. Leaf-blades 3-15 cm long; 1.5-8 mm wide. Leaf-blade surface scaberulous; rough on both sides. Inflorescence a panicle. Panicle contracted; oblong; interrupted; 5-25 cm long. Primary panicle branches 4-8 cm long. Panicle branches scabrous. Spikelets solitary. Fertile spikelets sessile. Fertile spikelets: Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 1.8-3.5 mm long; falling entire. Spikelet callus oblong; 0.2-1 mm long. Floret callus glabrous. Glumes similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume oblong; 1.8-3.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex truncate; awned; 1 -awned. Lower glume awn 4-15 mm long. Upper glume oblong; 1.8-3.5 mm long; 1.8-2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex truncate; awned; 1 -awned. Upper glume awn 4-15 mm long. Florets: Fertile lemma oblong; 1-1.7 mm long; cartilaginous; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma apex dentate; 4 -fid; truncate; awned; 1 -awned. Principal lemma awn from a sinus; 3.5-9 mm long overall. Palea 1 mm long; 1 length of lemma; hyaline; 2 -veined. Palea apex with excurrent keel veins. Flower: Lodicules 2; membranous. Anthers 3; 0.6-0.9 mm long. Caryopsis with adherent pericarp"  (GrassBase).

Habitat/ecology:  In California (U.S.), "weed, species characteristic of disturbed places, wetland-riparian. Usually occurs in wetlands, but occasionally found in non wetlands between 0 and 3280 feet"  (Calflora).

Propagation:  Seed

Native range:  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. 556)
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. 556)
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)
Mexico
Mexico
Mexico (United Mexican States) introduced
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Baja California
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Agr. Res. 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)
Arizona, Nevada


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

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This page was created on 12 FEB 2011 and was last updated on 4 APR 2011.